Watermelon Salad

I made this over the weekend and it was reallllly good. Give it a try if you want something a little different and refreshing!

Serves 4
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

DIRECTIONS
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.