1. Spray six 8-10 oz. ramekins or custard cups with cooking spray. (May alternately spray a 13x9-inch baking dish.)
2. Cook the macaroni in a large pot according to package directions. Drain well in a colander.
3. Melt butter in same large pot over medium heat. Reduce heat to low. Stir in remaining ingredients except Panko. Cook over low heat just until cheeses are melted, stirring often. Stir in drained macaroni. Divide into ramekins. Sprinkle each with 1 tablespoon of Panko. Spray Panko with cooking spray.
4. Heat oven to broil at 450 degrees. Place ramekins 4-5 inches from heat source for 3-5 minutes or until Panko is browned. Remove from oven. Garnish if desired. Serves 6.