4 slices Italian or sourdough bread (3 inches in diameter), toasted
4 slices Sargento® Sliced Swiss Cheese
Place whole squash on paper towel in microwave oven; cook on HIGH 5 minutes. Turn over; continue cooking 4 minutes more or until squash is barely tender when pierced with a knife. Let stand 5 minutes.
Melt butter in large saucepan over medium heat. Add onion; cook 8 minutes or until onion is soft, stirring occasionally. Cut squash in half; scoop out and discard seeds and membrane. Keeping squash shell intact, scoop out flesh, leaving 1/4-inch thick shell. Add squash pulp to onion mixture; cook 1 minute. Add chicken broth, nutmeg and, if desired, cayenne pepper and salt; bring to a boil. Reduce heat; simmer, uncovered, 10 minutes or until squash is very tender, stirring occasionally.
Transfer squash mixture to food processor or blender; process until smooth. Reheat soup until very hot. Arrange squash shells, cut sides up, in ovenproof bowls; place bowls on baking sheet; fill with hot soup. Top with toast and cheese. Place under preheated broiler 5 inches from heat; broil 3 minutes or until cheese is melted and golden brown.