Tuna Doria

Directions

1. 1
   First, saute diced onion in butter over low heat, careful not to let the butter brown, and when the onions are transparent make a white sauce.
2. 2
   An easy way to make white sauce is to add flour to onions and butter and stir until this mixture is almost brown.
3. 3
   At this point, add milk, stirring constantly until sauce is of a medium-thick consistency.
4. 4
   Second, to this mixture add at least one pound of grated white cheese.
5. 5
   When it's completely melted and the sauce is rich and creamy, add the tuna and season to taste.
6. 6
   Third, pour this mixture into a greased casserole dish and bake about 45 minutes or until Doria is slightly browned and fairly well set.