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, slightly beaten
3/4 c. milk
1/8 tsp. dry mustard
Dash of pepper
1/2 tsp. salt

Heat oven to 350 F. Toast bread; butter both sides of bread and cut diagonally. Mix ground beef, onion, celery, prepared mustard and 1/2 salt in medium 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 salt; pour over all. Sprinkle with paprika, if desired. Bake 30 to 35 minutes.