Cheeseburger Casserole
["8 slices day old bread", "1/2 lb. ground beef", "1/4 c. chopped onion", "2 Tbsp. chopped celery", "1 Tbsp. prepared mustard", "1/2 tsp. salt", "1 c. grated sharp Cheddar cheese", "1 egg, beaten", "3/4 c. milk", "1/8 tsp. dry mustard", "dash of pepper", "1/2 tsp. salt"]
["Heat oven to 350\u00b0 (moderate).", "Toast bread.", "Butter both sides and cut diagonally.", "Mix ground beef, onion, celery, prepared mustard and 1/2 teaspoon salt in medium size frying pan.", "Cook over medium heat until meat is lightly browned.", "Arrange toast, cheese and hamburger mixture in alternate layers in greased 9-inch square pan, ending with cheese as top layer.", "Mix egg, milk, dry mustard, pepper and 1/2 teaspoon salt.", "Pour over layers in pan. Sprinkle with paprika.", "Bake 30 to 35 minutes.", "Makes 4 to 6 servings."]
["bread", "ground beef", "onion", "celery", "mustard", "salt", "Cheddar cheese", "egg", "milk", "dry mustard", "pepper", "salt"]