12 day old bread slices
1/2 lb. process Cheddar cheese, thinly sliced
4 eggs
2 1/2 c. milk
1/2 tsp. prepared mustard
1 tbsp. minced onion
1 tsp. salt
1/8 tsp. pepper

Remove crusts from bread. Arrange 6 bread slices in a greased 12 x 8 x 2 inch baking dish, cover with cheese slices then with rest of bread.

Beat eggs, blend in milk and rest of ingredients. Pour over bread. Refrigerate for 1 hour. Bake uncovered at 325 degrees for about 50 minutes or until puffy and brown. Serve at once.