1 unbaked pie shell
1 can (12 oz.) Tuna
1 cup shredded muenster cheese
1/2 cup onion
3 eggs
1 cup mayonnaise
1/2 cup milk
Bake shell at 375 F for 10 minutes; cool. Mix all together and pour in pie shell. Bake at 375 F for 50 minutes. Serve as dinner with salad and pasta. Leftovers are fine lunch box fillers.