1/2 lb. (8 oz.) uncooked macaroni
1 tsp. butter
1 egg, beaten
1 tsp. dry mustard
1 tsp. salt
1 c. milk
3 c. grated sharp cheese

Boil macaroni in water until tender and drain thoroughly. Stir in butter and egg. Mix mustard and salt with 1 tablespoon hot water and add to milk; set aside.

Add cheese to macaroni, reserving enough cheese to sprinkle on top. Pour into greased casserole; add milk, sprinkle with reserved cheese.

Bake in preheated 350 degree oven for about 45 minutes or until custard is set and top is crusty.