Preheat oven to 425 degrees F. Remove crust from freezer and let thaw 10-15 minutes. Prick bottom and sides to prevent puffing. Bake for 3-5 minutes or until lightly browned, Remove from oven and set aside to cool.
In a large bowl, combine eggs, milk and mayonnaise and toss in drained tuna and cheese. Pour into baked crust.
Bake 30 minutes or until knife inserted in center comes out clean. Cool before cutting.