Lane Crowther, A contributing editor at Bon Appétit, says that "For twenty-five years our family endured side dishes of canned creamed corn and sweetened baked squash—simply for the sake of tradition. With this soup, I was finally able to convince everyone that a few classic Thanksgiving ingredients (like corn and squash) could be combined in a delicious new way."
Cook pancetta in heavy large saucepan over medium heat until crisp, about 8 minutes. Using slotted spoon, transfer pancetta to paper towels. Add onion to drippings in pan; sauté until just tender, about 4 minutes. Add butternut squash, broth and chilies; simmer until squash is tender, stirring occasionally, about 20 minutes. Mix in corn; simmer until tender, about 8 minutes. Transfer 3 1/2 cups soup to blender; puree. Mix puree into remaining soup in pan. Season with salt and pepper. (Pancetta and soup can be made 8 hours ahead. Cover pancetta; chill. Chill soup uncovered until cold, then cover and keep chilled. Bring pancetta to room temperature before continuing.) Heat oil in large nonstick skillet over medium-high heat. Add frozen cheese; brown well, about 1 minute per side.
03Meanwhile, bring soup to simmer. Mix in sage. Ladle soup into bowls. Top with pancetta and cheese croutons.