4 tbsp. fat (Crisco)
4 tbsp. flour
1/2 tsp. pepper
2 1/4 c. milk
1 can tuna fish
13 oz. pkg. potato chips
1/2 c. mushrooms

Heat fat, stir in flour and blend; add salt. Slowly add milk, stirring until smooth, simmer until sauce begins to thicken. Add flaked tuna and sliced mushrooms. Crush 3/4 of the potato chips and add to mixture; season to taste. Sprinkle remaining chips on top; bake in casserole for 30 minutes at 350 degrees.