2 12 oz. cans flaked tuna
3 eggs
1/4 c. milk
1/2 c. onion, chopped
1 c. salad dressing (Miracle Whip)
1 c. shredded cheddar cheese
9 inch unbaked pie shell

Mix milk and salad dressing. Add eggs, cheese, onion, and tuna. Pour into unbaked pie shell.

Bake at 350°F until knife comes out clean.