Melt the garlic butter and combine with the bread crumbs and set aside.
Heat a medium frying pan over medium-high heat. Add in the olive oil and garlic. Cook the garlic until lightly browned then add in the mussels and cook for another minute.
Add the wine into the pan and cook for another minute or two or until the wine has mostly evaporated.
Add the tomato, basil, and salt and pepper into the pan, put a lid on it and simmer for 5 minutes or until all the mussels have opened.
Serve the mussels and garnish with the garlic bread crumbs.