1 pound cavatappi (you can use elbow macaroni if you can’t find this), cooked and drained
6 tablespoons butter
½ cup flour
4 cups milk
1 teaspoon dry mustard
¼ teaspoon cayenne
3 cups grated cheddar cheese
¾ cup grated mozzarella
1-1/2 cups crushed potato chips
1 cup grated cheddar
½ cup grated mozzarella
¼ cup imitation bacon bits
Preheat oven to 375 degrees. Grease a 9 x 13-inch pan.
In a large saucepan, melt the butter over low heat. Whisk in flour until blended. Gradually whisk in milk until sauce is thickened. Stir in mustard, cayenne and hot sauce. Stir in cheddar, mozzarella and cooked pasta and toss until well mixed. Pour into prepared pan.
In a small bowl, combine all topping ingredients and sprinkle over pasta. Bake for about 45 minutes, or until top is brown and beginning to crisp.