Mornay Sauce:
Melt butter in small saucepan and add flour. Stir into smooth paste and
add milk. Stir continually and cook over low flame for 10 minutes. Sauce
should have the consistency of thick cream. Add salt and pepper and
nutmeg, Stir. Remove from stove and stir in cheese and egg yolk rapidly.
Makes about 1 1/2 cups.
Macaroni and Cheese Casserole:
Cook macaroni in boiling salted water for about 10 minutes, or until just
tender, but still quite firm. Drain. Mix with sauce, cheese and pepper.
turn into buttered casserole, dot with butter and bake at 350 degrees for
30 minutes.
Serves 4.
Source: The Italian Cookbook, dated 1955