Chilled Watermelon Soup

Name: Chilled Watermelon Soup
Ingredients: 7 cups diced watermelon, cut into 1-inch cubes; Salt and pepper; Pinch of cayenne; 1 tablespoon red wine vinegar or sherry vinegar; 4 tablespoons fresh lime juice, plus lime wedges for serving; 2 cups diced honeydew melon or cantaloupe, cut into 1-inch cubes; 2 cups diced cucumber, cut into 1-inch cubes; 2 tablespoons extra-virgin olive oil; 2 tablespoons snipped chives; Handful of small basil leaves; Handful of small mint leaves; Pinch of crushed red pepper (optional); Pinch of flaky salt such as Maldon or fleur de sel (optional)