3/4 - 1 cup of cold watermelon, cubed
1/4 cup of feta cheese, crumbled or cubed
1/4 medium red onion, cut in paper-thin slices
1/4 teaspoon of balsamic vinegar or balsamic vinaigrette
Place the watermelon in a bowl, top with most of the onions, then the feta cheese. Place remaining onions on top. Sprinkle with balsamic vinegar, and serve.