2 eggs, well beaten
1/2 c. evaporated milk
1/2 c. water
3/4 tsp. dry mustard
1 tbsp. grated onion
3/4 tsp. salt
3 c. cooked macaroni
1 1/2 c. grated American cheese
1 (6 oz.) can tuna

Mix all ingredients together and turn into greased baking dish, 6x10 inches. Bake in 375 degree oven until firm and light brown, about 1 hour. Cut into squares and top with catsup or chili sauce. Serves 6.