01 - Bring a pot of water to a rolling boil. Blanch 2 cups of the corn kernels for 2 minutes, then drain and immediately transfer to an ice bath to halt cooking. Drain thoroughly and set aside. Reserve the remaining 1 cup of uncooked corn kernels for garnish and added texture.
02 - Combine the blanched corn, diced cucumber, yellow bell pepper, tomatoes, shallot, garlic, chilled vegetable broth, olive oil, lime juice, sea salt, black pepper, and ground cumin in a blender. Purée on high speed until completely smooth and velvety.
03 - Taste the puréed soup and adjust salt, pepper, or lime juice as needed. For a silkier, refined texture, pass the soup through a fine-mesh sieve, pressing with a spatula to extract all liquid. Discard any solids.
04 - Transfer the gazpacho to a covered container and refrigerate for at least 1 hour, or up to overnight, to allow the flavors to meld and intensify.
05 - Ladle the chilled gazpacho into individual bowls. Top each serving with the reserved raw corn kernels, a sprinkle of chopped chives or cilantro, diced avocado if desired, and a light drizzle of extra-virgin olive oil.