Ingredients

2 tablespoons white-wine vinegar

2 tablespoons olive oil

Coarse salt and ground pepper

3 bunches arugula (about 12 ounces total), thick stems removed

1/4 medium red onion, thinly sliced

1 1/2-pound piece chilled seedless watermelon, rind removed, cut into small chunks (2 to 3 cups)

4 ounces feta cheese, crumbled

Preparation

In a small bowl, whisk together vinegar and oil. Season with salt and pepper.

In a large bowl, combine arugula and onion; toss with dressing to taste. Gently toss with watermelon and feta, and serve.