Crockpot Macaroni & Cheese

8 ounces macaroni, cooked and drained
12 ounces shredded cheddar cheese
1/2 lb Velveeta cheese
6 ounces evaporated milk
1-3/4 cups milk
1/4 cup melted margarine
1 egg
salt & pepper
paprika

Grease crockpot with margarine. Mix all ingredients except hold back 1/3 cup shredded cheese and paprika. Pour into crockpot and top with 1/3 cup shredded cheese and paprika. Cook 3 to 3-1/2 hours on LOW. Do NOT overcook!