Ingredients

1. 1/2 pound watermelon cubes (2 cups)
2. 2 large yellow tomatoes, cored and thinly sliced
3. 1/2 seedless cucumber, peeled and thinly sliced
4. 1/2 yellow bell pepper, cored and thinly sliced
5. 1/4 Spanish onion, thinly sliced
6. 1 garlic clove, smashed
7. 1/2 tablespoon red wine vinegar
8. 1/2 tablespoon Champagne or white wine vinegar
9. 1 tablespoon fresh lemon juice
10. Salt and freshly ground pepper
11. 1/4 cup plus 1 tablespoon extra-virgin olive oil
12. Two 1 1/4-pound cooked lobsters, tail and claw meat coarsely chopped (1 pound)
13. 1 Hass avocado, thinly sliced
14. 1 tablespoon tarragon leaves, for garnish
15. 1 tablespoon mint leaves, for garnish

Directions

1. In a blender, puree half of the watermelon cubes. Strain the watermelon juice through a fine sieve set over a large glass or stainless steel bowl. Add the remaining watermelon and the tomatoes, cucumber, bell pepper, onion, garlic, red wine and Champagne vinegars and a 1/2 tablespoon of the lemon juice. Season lightly with salt and pepper and refrigerate for at least 6 hours or overnight.
2. Transfer the mixture to a blender and puree until smooth. With the machine on, slowly pour in 1/4 cup of the olive oil. Strain the soup into a bowl through a fine meshed sieve, pressing hard on the solids to extract as much liquid as possible. Discard the solids. Season the gazpacho with salt and pepper.
3. In a small bowl, toss the lobster with the remaining 1/2 tablespoon of lemon juice and 1 tablespoon of olive oil; season with salt and pepper. Ladle the gazpacho into shallow soup plates. Mound the lobster in the center of each soup and top with a few slices of avocado. Garnish with the tarragon and mint and serve immediately.

Make Ahead

The soup can be made through Step 2 and refrigerated overnight.