Cabbage Au Gratin

1 small, firm head of cabbage
1 teaspoon butter
2 cups milk
4 tablespoons flour
4 tablespoons fat
1 teaspoon salt
2/3 cup grated cheese
1/2 cup bread crumbs

Soak cabbage in cold, salted water for 15 minutes. Put enough water in saucepan to partially cover cabbage and bring to a boil. Cut cabbage in small pieces, discard core. Drop into boiling water,cover, cook 8-10 minutes. Prepare white sauce in double boiler, add cheese, cook till cheese is melted. Drain cabbage, place in casserole. Pour white sauce over cabbage. Sprinkle bread crumbs over top. Bake 25-30 minutes until top is brown.