Cheeseburger Casserole
["8 slices day old bread", "butter", "1/2 lb. ground beef", "1/4 c. chopped onion", "2 Tbsp. chopped celery", "1 Tbsp. prepared mustard", "1/2 tsp. salt", "1 c. shredded cheese", "1 egg, beaten", "3/4 c. milk", "1/2 tsp. salt", "dash of pepper", "1/8 tsp. dry mustard"]
["Toast bread; butter both sides.", "Cut in half diagonally.", "In skillet, mix ground beef, onion, prepared mustard and salt.", "Cook and stir over medium heat until meat is slightly browned.", "Arrange toast, hamburger mixture and cheese in alternate layers in a greased 9 x 9 x 2-inch deep pan.", "Mix egg, milk, salt, pepper and dry mustard.", "Pour over layers in pan.", "Sprinkle with paprika, if desired.", "Bake, uncovered, at 350\u00b0 for 30 to 35 minutes."]
["bread", "butter", "ground beef", "onion", "celery", "mustard", "salt", "shredded cheese", "egg", "milk", "salt", "pepper", "dry mustard"]