Cold lemony quinoa with cucumber, tomato, red onion, kalamata olives and a lot of crumbled feta, spooned into a hot split sweet potato.
That is the dish, and that contrast is the entire reason it works.
Hot, soft, earthy, faintly sweet underneath.
Cool, crunchy, sharp and salty on top.
I stumbled into it by accident on a Sunday in July.
There was leftover Greek salad in the fridge and two sweet potatoes I had roasted for no particular reason.
I split one open, tipped the salad in because I could not be bothered to make anything else, and stood at the counter eating it out of the skin.
My wife came in halfway through and I had to go roast another one.
We eat some version of this most weeks now, usually on a Monday.
One thing up front, because these two get mixed up constantly.
This is a stuffed sweet potato, not a twice-baked one.
The flesh never leaves the skin.
You roast the potato, split it, press the inside open with a fork, and pile the filling into the well you made.
One bake, no scooping, no mashing, no second trip to the oven.
Which matters here, because half the filling is raw and a second bake would wreck it.
The whole thing takes about an hour, most of it oven time while you make the quinoa.
The Filling Is the Whole Dish
Nobody needs another article about how to bake a sweet potato. The filling is what makes this worth cooking, so let's start there.
Quinoa is the carrier, not the flavor.
On its own it tastes like almost nothing, which is exactly why it works as a base.
What actually carries this filling: lemon, dried oregano, brined feta, kalamata olives, and raw crunch from cucumber and red onion.
Why the Temperature Contrast Matters
Hot potato, cool filling.
Skip that and you get a bowl of warm mush where everything tastes the same.
The cucumber has to still snap when you bite it, and it will not if you fold it into quinoa that is still steaming.
Pro tip: spread the cooked quinoa on a plate for 10 minutes before anything else touches it. It cools fast and it stops the feta melting into paste.
Go Easy on the Salt
Feta in brine is salty and kalamata olives are saltier.
Salt the quinoa lightly while it cooks, then taste the finished filling before you add another grain.
I almost never need more.
Stuffed, Not Twice-Baked
These are two different techniques and they produce two different dishes.
- Stuffed. The potato is roasted, split lengthwise, the flesh loosened with a fork into a well, and the filling piled into it. The skin holds everything. One bake.
- Twice-baked. The flesh is scooped out entirely, mashed with butter, cheese or whatever else, spooned back into the empty skins, and baked a second time until the top browns.
Twice-baked is great, and it is not what we want here.
A second bake would wilt the cucumber, turn the tomatoes to water, and make the feta go greasy and separated.
Everything cold in this filling needs to stay cold.
Roasting the Sweet Potatoes
One section, then we move on. There is not much to it, but there are two things people get wrong.
Heat the oven to 425°F.
Scrub the potatoes, dry them, and prick each one six or eight times with a fork.
Rub them with a little olive oil and a pinch of salt, then set them straight on a foil lined sheet pan.
Roast 45 to 55 minutes depending on size.
The Two Mistakes
- Wrapping them in foil. That steams the skin instead of roasting it. You want a tight, slightly leathery skin that holds the filling like a bowl.
- Pulling them too early. A knife into the thickest part should meet no resistance whatsoever. If there is any firmness in the middle, give it another 10 minutes.
How do I know it's done? Sticky dark syrup bubbling out of the fork holes. That is sugar caramelizing on the skin and it is the best sign there is.
Can I Microwave Them Instead?
You can, and on a Tuesday I sometimes do.
8 to 10 minutes, turning once, wrapped in a damp paper towel.
What you lose is the caramelized skin and some of the concentrated flavor, because microwaving steams rather than roasts.
Worth it on a weeknight? Sometimes. Not for company.
Making the Quinoa Filling
Rinse the quinoa. Every time, in a fine sieve, under cold water for 30 seconds.
The natural coating on the outside is bitter and soapy, and rinsing is the difference between good quinoa and the quinoa people say they do not like.
Cook it in chicken broth rather than water, ¾ cup quinoa to 1 ⅓ cups liquid.
Bring it to a boil, cover, drop to low, and cook 15 minutes.
Then take it off the heat and let it sit, still covered, for 10 more minutes before you lift the lid.
That rest is what makes it fluffy instead of wet.
Fluff it with a fork, spread it out, and let it cool to room temperature.
Then fold everything else in gently. Do not stir it hard or the feta smears.
The Lemon Oregano Dressing
Four ingredients and a whisk, and it takes about ninety seconds.
3 tablespoons olive oil, 3 tablespoons fresh lemon juice plus the zest of a whole lemon, 1 minced garlic clove and 1 teaspoon dried oregano.
Whisk it in the bottom of the mixing bowl, then pile the cooled quinoa and vegetables on top and fold.
Dress the filling, never the potato.
A dressed potato goes soggy in about four minutes.
Worth trying: crumble a spoonful of the feta into the dressing and whisk it until it breaks up. It goes creamy and coats the quinoa instead of sitting in it.
Dried oregano beats fresh here, which is not something I say often. It is more concentrated and it is what tastes Greek.
Ingredients You'll Need
Buy feta in a block, sitting in brine. That one choice matters more than anything else on this list.
- Sweet potatoes (4 medium, 8 to 10 ounces each). Similar sizes so they finish together.
- Quinoa (¾ cup dry). White, red or tricolor. Rinsed.
- Chicken broth (1 ⅓ cups). For cooking the quinoa. Free flavor.
- Cherry tomatoes (1 cup). Quartered so they release less water than halves do.
- English cucumber (1 cup, diced small). The crunch. Do not skip it.
- Red onion (½ small). Diced fine. Sharp and raw.
- Kalamata olives (½ cup). Pitted and halved. Briny and meaty.
- Flat leaf parsley (⅓ cup, chopped). Fresh and green against all the salt.
- Feta (4 ounces). Block, in brine, crumbled by hand into uneven pieces.
- Olive oil (3 tablespoons, plus 1 for the potatoes). Good stuff, this is a raw application.
- Lemon (1 large). Juice and zest both.
- Garlic (1 clove). Minced, raw, in the dressing.
- Dried oregano (1 teaspoon). Greek if you can find it.
- Fine salt and coarse black pepper. Lightly, then taste.
Ingredient Notes and Substitutions
- Block feta vs. pre-crumbled. Pre-crumbled is coated with anti-caking starch and it tastes dry and chalky. Block feta in brine is creamy and tangy. It costs a dollar more.
- No feta? Ricotta salata is the closest. Goat cheese works but goes soft and creamy instead of staying in crumbles.
- Cucumber. English or Persian, both have thin skins and small seeds. If you only have a standard cucumber, peel it and scrape the seeds out.
- More protein. A drained can of chickpeas folded into the filling, or shredded rotisserie chicken.
- Vegetarian. Cook the quinoa in vegetable broth and it is done.
- Olives. Kalamata are worth buying properly. The canned black olive rings are a different food entirely.
How to Make Greek Stuffed Sweet Potatoes
Step 1: Roast the Sweet Potatoes
Heat the oven to 425°F.
Prick the scrubbed potatoes all over, rub with olive oil and salt, and roast on a lined sheet pan for 45 to 55 minutes, until a knife meets no resistance.
Step 2: Cook and Cool the Quinoa
Rinse the ¾ cup quinoa well.
Bring it to a boil with the 1 ⅓ cups broth, cover, reduce to low and cook 15 minutes.
Rest it off the heat, covered, for 10 minutes, then fluff and spread it out to cool.
Step 3: Make the Dressing and Prep the Vegetables
Whisk the olive oil, lemon juice and zest, garlic, oregano, pepper and a small pinch of salt in a large bowl.
Quarter the tomatoes, dice the cucumber and red onion, halve the olives, chop the parsley.
Step 4: Fold the Filling Together
Add the cooled quinoa to the dressing bowl and turn it through.
Add the tomatoes, cucumber, onion, olives and parsley and fold gently.
Add most of the crumbled feta, saving a handful for the top, and fold once more.
Taste it now. This is your last chance to fix the salt.
Step 5: Split, Fluff and Fill
Split each hot potato lengthwise, cutting most of the way through but not all the way.
Push the ends toward each other so it opens up.
Drag a fork through the exposed flesh to loosen it into a well.
Spoon the filling in, letting it settle inside the skin, then finish with the reserved feta.
Additional Toppings and Add-Ins
The base is finished as it is, but these all earn their place.
- Tzatziki. Or plain Greek yogurt thinned with lemon juice. A cool creamy line through the middle.
- Toasted pine nuts or chopped walnuts. More crunch and a bit of richness.
- Fresh dill or mint. Either one, chopped and stirred in at the end.
- Aleppo pepper. A pinch over the top for gentle heat and color.
- Grilled chicken or lamb meatballs. On the side, when you want a heavier dinner.
- A squeeze more lemon. Right before eating. It wakes the whole thing up.
Make Ahead and Meal Prep
This is the part that made it a weekly thing in our house. The filling actually improves after a few hours in the fridge.
- The filling. Keeps 4 days airtight. The olives and lemon work into the quinoa overnight and it gets better.
- The potatoes. Roast them up to 3 days ahead. Reheat at 375°F for 15 minutes, or 90 seconds in the microwave.
- Store them apart. This is the only rule that really matters. Assembled potatoes go watery, because the filling weeps into the flesh overnight.
- Packed lunch. Potato in one container, filling in another, combine when you eat. It is genuinely good at room temperature.
- Freezing. Do not. Cucumber and tomato do not survive it.
Serving It as a Main or a Side
One whole potato per person makes a real dinner, especially with chickpeas or chicken in the filling.
Half a potato each turns it into a side dish.
It goes with roast lemon chicken, grilled lamb, or any simply cooked white fish.
A bowl of olives, some warm pita and a plate of sliced tomatoes rounds it into a full spread.
More Sweet Potato Recipes
A sweet potato is one of the best vehicles in the kitchen for a cold sharp filling. Once you have the roast-and-split part down, almost any salad you like will work in there.
Make it once and tell me what you put in yours!
Recipe
Greek Stuffed Sweet Potatoes With Quinoa and Feta
Ingredients
For the Sweet Potatoes
- 4 medium sweet potatoes 8 to 10 ounces each, scrubbed
- 1 tablespoon olive oil
- ½ teaspoon fine salt
For the Quinoa Filling
- ¾ cup quinoa rinsed well
- 1 ⅓ cups chicken broth
- 1 cup cherry tomatoes quartered
- 1 cup English cucumber diced small
- ½ small red onion diced fine
- ½ cup pitted kalamata olives halved
- ⅓ cup flat leaf parsley chopped
- 4 ounces block feta in brine crumbled by hand
For the Lemon Oregano Dressing
- 3 tablespoons olive oil
- 3 tablespoons fresh lemon juice plus the zest of 1 lemon
- 1 clove garlic minced
- 1 teaspoon dried oregano
- ¼ teaspoon coarse black pepper
- ¼ teaspoon fine salt
Instructions
Roast the Potatoes
- Heat the oven to 425 degrees F. Prick the scrubbed sweet potatoes six or eight times each with a fork, rub with olive oil and salt, and set them on a foil lined sheet pan. Do not wrap them in foil.
- Roast 45 to 55 minutes, until a knife slides into the thickest part with no resistance and syrup is bubbling from the fork holes.
Make the Filling
- Rinse the quinoa in a fine sieve under cold water for 30 seconds. Bring it to a boil with the broth, cover, reduce to low and cook 15 minutes.
- Take it off the heat and rest it, still covered, for 10 minutes. Fluff with a fork, spread it out and let it cool to room temperature.
- Whisk the olive oil, lemon juice and zest, garlic, oregano, pepper and salt in a large bowl.
- Add the cooled quinoa and turn it through the dressing. Fold in the tomatoes, cucumber, red onion, olives and parsley, then most of the crumbled feta, saving a handful for the top. Taste and adjust the salt.
Stuff and Serve
- Split each hot sweet potato lengthwise, cutting most of the way through but not all the way, and press the ends toward each other so it opens.
- Drag a fork through the exposed flesh to loosen it into a well, leaving the flesh in the skin.
- Spoon the quinoa filling into each potato and finish with the reserved feta and a squeeze of lemon.
Notes
- Stuffed, not twice-baked: The flesh stays in the skin. A second bake would wilt the cucumber and turn the feta greasy.
- Cool the quinoa: Spread it out for 10 minutes before folding in the vegetables and feta, or the cucumber goes limp and the cheese smears.
- No foil on the potatoes: Foil steams the skin. You want it tight and slightly caramelized so it holds the filling like a bowl.
- Buy block feta in brine: Pre-crumbled feta is coated in starch and tastes dry.
- Meal prep: Filling keeps 4 days and improves overnight, potatoes keep 3 days. Store them separately and assemble only when you eat.
