Tuna Macaroni Bake
["2 eggs, well beaten", "3/4 c. evaporated milk", "1/2 c. water", "3/4 tsp. dry mustard", "1 Tbsp. onion", "3/4 tsp. salt", "3 c. cooked macaroni", "1 1/2 c. grated American cheese", "1 (No. 1/2) can tuna"]
["Mix all ingredients together and turn into greased 6 x 10-inch baking dish.", "Bake in a 375\u00b0 oven until firm and light brown, about 1 hour.", "Cut into squares and top each with catsup or chili sauce.", "Serves 6 to 8."]
["eggs", "milk", "water", "dry mustard", "onion", "salt", "macaroni", "American cheese", "tuna"]