Preheat oven to 350degrees. Cook macaroni according to package directions. Meanwhile, combine Muenster, cheddar and Monterey Jack cheeses; set aside., In a large saucepan, melt 1/2 cup butter over medium heat. Stir in cream, eggs, process cheese, seasonings and 1-1/2 cups of cheese mixture. Drain pasta; add to cheese mixture and stir to coat., Transfer to a greased 2-1/2-qt. baking dish. Sprinkle with remaining cheese mixture and dot with remaining butter. Bake, uncovered, until a thermometer reads 160degrees, 40-45 minutes.