Cauliflower with Parmesan Cheese - Blomkål med Parmesanost

Serves 6

Cook cauliflower in salted boiling water until tender. Drain; pale in casserole, broken up.

Melt butter; add flour, then milk, stirring continuously. When slightly thickened, stir in egg yolk, salt, sugar and cheese. Thicken. Pour over cauliflower. Sprinkle crumbed zwieback.

Bake in moderate (375°F) oven 15 minutes (or longer).