Zucchini and Lettuce Soup With Pesto Recipe

Name: Zucchini and Lettuce Soup With Pesto Recipe
Ingredients: 2 tablespoons (30g) unsalted butter; 1 medium onion, chopped (about 6 ounces; 170g); 2 medium stalks celery, chopped (about 4 ounces; 130g); 1 large carrot, chopped (about 4 ounces; 130g); Kosher salt and freshly ground black pepper; 1 teaspoon (about 3g) whole coriander seed; 1/2 teaspoon (about 2g) fennel seed; 1/4 cup dry rice (about 1 1/2 ounces; 50g); 1 pound zucchini, split in half lengthwise and cut into 1/2-inch pieces (about 2 large zucchini; 450g); 6 ounces lettuce or spinach, washed (about 6 cups packed leaves); 2 bay leaves; 1/2 cup (120ml) heavy cream; 1/4 cup roughly chopped fresh basil leaves (1/4 ounce; about 7g); 1 teaspoon (about 3g) fresh lemon zest; To Serve:; 1 recipe pesto