From http://www.epicurious.com/recipes/food/views/Chilled-Watermelon-... , but the flavor profile would probably also make a great salad.

6 pounds yellow or red seedless watermelon, diced (9 cups)
2 tablespoons chopped fresh mint
1 tablespoon sugar
2 tablespoons fresh lemon juice
1 cup lightly sweet white wine (such as Riesling) or 3/4 cup water mixed with 1/4 cup sugar
1 teaspoon chopped ginger
8 teaspoons crumbled feta
1/4 cup sparkling wine (or sparkling water)