Ingredients

2 pounds green beans, trimmed

Coarse salt and ground pepper

1/3 cup olive oil

2 tablespoons white-wine vinegar

1 teaspoon Dijon mustard

2 cups quartered cherry tomatoes

1/2 cup sliced scallions

1/2 cup crumbled feta cheese

Preparation

Cook beans in a large pot of boiling salted water until crisp-tender, 6 to 8 minutes. Drain in a colander; run under cold water to stop cooking.

Whisk oil with vinegar and mustard; season with salt and pepper.

Toss beans with vinaigrette, tomatoes, scallions, and feta.