INGREDIENTS
1 tbsp
Butter or stick margarine
6 cups
Elbow macaroni, cooked
1/3 cup
All-purpose flour
1/4 tsp
Salt
1
Cooking spray
1/3 cup
Onion melba toasts
2 2/3 cups
1% low-fat milk
1
Cheddar cheese
3/4 cup
Fontina or swiss cheese
1/2 cup
Parmesan cheese, grated fresh
3 oz
Processed cheese, light
1/2 cup
shredded extra-sharp