For garnish: finely diced watermelon, red onion, and avocado, fresh basil leaves and olive oil
- Place the watermelon rind, red onion, and garlic in a blender or food processor. Blend until finely chopped.
- Add the watermelon, tomato, basil, red wine vinegar, olive oil, salt, and pepper. Blend again until mostly pureed, with a little texture left. You can also puree until completely smooth if you'd like!
- Refrigerate to save (this tastes even better the next day), or pour into bowls, garnish, and enjoy.