The recipe yield is:
Heat oven to 375'F. In large mixing bowl, combine bread, milk, eggs, mustard, garlic powder, and paprika. With electric mixer, beat at medium speed 1 minute or until smooth. Stir in SPAM, 1 cup shredded Cheddar cheese, and onion. Pour into greased 12x8" baking dish. Bake 25 minutes. Top with remaining Cheddar cheese and Monterey Jack cheese. Bake 5 minutes longer or until cheese is melted. Let stand 10 minutes before serving.