Watermelon Gazpacho with Feta and Mint

Name: Watermelon Gazpacho with Feta and Mint
Ingredients: 16 ounces cubed, seedless watermelon, plus extra bite-sized cubes for garnish; 2 Roma tomatoes, hulled and quartered; 1/2 cucumber, seeded and chopped; 2 tablespoons sliced shallots; 1/2 Serrano chile (a whole one if you like heat; none if you don't); 4 fresh basil leaves, roughly torn; 1 1/2 tablespoons champagne vinegar; 2 tablespoons high-quality olive oil; Salt and pepper to taste; 4 ounces fresh feta, crumbled; 2 tablespoons fresh mint, chopped