1. Cut peppers in half; remove seeds. Broil peppers 4 in. from the heat until skins blister, about 5 minutes. Immediately place peppers in a small bowl; cover and let stand for 20 minutes. Peel off and discard charred skin. Chop peppers.
2. In a large saucepan coated with cooking spray, saute onion in oil for 3 minutes. Add garlic; cook 1 minute longer. Add squash; cook for 3 minutes. Stir in the stock, curry powder, salt, cinnamon, pepper and red peppers. Bring to a boil. Reduce heat; cover and simmer for 20-25 minutes or until squash is tender.
3. Cool slightly. In a blender, process 7 cups soup in batches until smooth. Return all to pan and heat through. Garnish with cilantro if desired. Yield: 9 servings (2-1/4 quarts).