Quick, easy, and delicious—what else could you want from a meal? Be sure to discard mussels that won’t close before cooking and those that don’t open after cooking. And, as with every recipe, taste before you season with salt and pepper; the mussels may be briny enough from the ocean.
In a large, heavy-bottomed saucepan over high heat, add olive oil and sauté garlic until softened and fragrant, about 2 minutes. Add wine and bring to a boil; add mussels, cover, reduce heat, and simmer 3 minutes.
With a slotted spoon, remove opened mussels to a large bowl. Continue cooking remaining mussels 2 minutes; others may open. Discard unopened mussel shells, reserving broth.
Bring broth to a boil; reduce heat and simmer 5 minutes. Stir in tomatoes and scallions and cook about 30 seconds. Add mussels and toss just to reheat.
Season to taste with salt; sprinkle generously with freshly ground pepper. Garnish with fresh parsley and additional scallion slices. Serve with crusty French rolls.