4 tbsp. butter
1/2 c. flour
2 c. milk
1 egg
1 tsp. ground mustard
1 tsp. salt
1/4 tsp. pepper
1 (7 oz.) can tuna fish
1 sm. can peas
1 1/2 c. bread crumbs

Make white sauce of butter, flour, and milk. Remove from range and beat in egg, ground mustard, salt, and pepper. Add tuna fish, peas, and 1/2 of bread crumbs. Pour into greased casserole and sprinkle with remaining bread crumbs. Bake in moderate oven (350 degrees) for 1 hour. Yield 6 servings. Very good and simple to make.