Tomato Watermelon Gazpacho Soup

Name: Tomato Watermelon Gazpacho Soup
Ingredients: 3 cups (450 grams) watermelon (peeled and diced); 2¼ cups (450 grams) tomatoes (chopped); 1 red bell pepper (cored, seeded and diced); ½ English cucumber (diced); 1 clove garlic; 2 tablespoons sherry vinegar; ¼ cups extra virgin olive oil ((4 tablespoons)); 1 teaspoon Kosher salt; ½ teaspoon freshly ground pepper; ¼ English cucumber (finely diced); 1 tomato (seeded and finely diced); ½ red onion (peeled and finely diced); ½ cup watermelon (finely diced); fresh basil leaves