Alfredo Sauce (Heavy Cream)

Yield: 6 servings

2 tablespoons butter or margarine
1 teaspoon fresh nutmeg, grated
1 small onion, thinly sliced
1/2 teaspoon salt
4 cups whipping cream
1/2 teaspoon pepper
2 tablespoons Parmesan cheese

Heat margarine in skillet, over medium heat. Saut