This was a really unique salad---we enjoyed it very much for something different and it was full of flavor. It does not taste like watermelon!! I found this in The Blue Willow Inn Bible of Southern Cooking. You need to get this book for over 600 different recipes used in the South!
1 medium Vidalia onion
4 cups cubed and seeded watermelon
2 tablespoons minced fresh basil
1/4 cup balsamic vinegar
salt and pepper
Peel, quarter, and thinly slice the onion. In large bowl combine onion, watermelon, and basil . Drizzle with the vinegar. Toss gently. Add the salt and pepper to taste. Refrigerate for up to 1 hour. Serve with a slotted spoon. Serves 4-6.