Quickie Tuna Swiss Pie

Ingredients
- 1 12 12 oz can tuna flaked
- 1 c shredded Swiss cheese
- 12 c sliced onion
- 3 eggs
- 1 c mayonnaise
- 12 c milk
Directions
- Toss together tuna cheese and onion
- Spoon into unbaked pie shell
- In bowl stir remaining ingredients
- Slowly pour over tuna mixture