Herb Roasted Sweet Potato Cubes With Garlic and Sage
Sweet potato cubes roasted hot on a preheated sheet pan until the flat faces brown and the centers go soft, with minced garlic and fresh sage added in the last eight minutes so they perfume the pan instead of burning.
Servings 4 servings
Ingredients
For the Sweet Potato Cubes
- 2 pounds sweet potatoes scrubbed, skin on, cut into ¾ inch cubes
- 2 tablespoons olive oil
- 1 teaspoon kosher salt
- ½ teaspoon black pepper
Added at the End
- 3 cloves garlic minced
- 1 tablespoon fresh sage finely chopped
- flaky salt and lemon zest to finish, optional
Instructions
Prep the Cubes
- Heat the oven to 425F with a large rimmed sheet pan on the middle rack.
- Scrub the sweet potatoes and dry them thoroughly with a towel. Leave the skins on.
- Trim a thin slice off one long side so each potato sits flat. Cut lengthwise into ¾ inch planks, stack the planks and cut into ¾ inch batons, then cut across into cubes. Cut the tapered ends a little thicker so every piece is roughly the same volume.
- Toss the dry cubes with the olive oil, salt and pepper until every face is coated. Do not add the garlic or sage yet.
Roast
- Spread the cubes on the hot sheet pan in a single layer with visible space around each one. If the pan looks tight, split them across two pans: crowding is the main cause of soft, pale cubes.
- Roast 15 minutes, flip everything once, then roast 5 minutes more.
- Scatter the minced garlic and chopped sage over the cubes, toss quickly so they land in the oil clinging to the potatoes, and roast a final 8 minutes.
- They are done when the flat faces are deep browned and a cube crushes easily against the pan. Finish with flaky salt and lemon zest while hot.
Notes
- Garlic and sage go in late: minced garlic turns bitter in about 15 minutes at 425F and chopped sage goes acrid on the same schedule. Add both with 8 to 10 minutes left.
- Space is the whole trick: cubes that touch each other steam instead of browning. One big pan or two, never one crowded one.
- Dry the cubes: towel them off before oiling. Surface water has to boil away before browning can start.
- Do not soak or parboil: soaking leaves a wet potato and parboiling gives you cubes that fall apart on the pan.
- One flip only: every extra stir breaks the crust that is forming.
- Storage: 4 days refrigerated, and genuinely good cold in a grain bowl or a salad. Reheat at 425F for 5 to 7 minutes or in an air fryer at 390F for 4 minutes, never the microwave.