1 In a medium saucepan melt 2 tablespoons margarine or butter; stir in flour, salt, and pepper. Stir in milk all at once. Cook and stir over medium heat until thickened and bubbly. Gradually stir hot mixture into egg yolks; set aside. In a large mixing bowl beat egg whites with an electric mixer on high speed until stiff peaks form (tips stand straight). Fold into yolk mixture.
2 In a 10-inch oven-going skillet heat the remaining 2 tablespoons margarine or butter until a drop of water sizzles. Spoon in egg mixture, mounding it slightly higher at the side. Cook over low heat for 8 to 10 minutes or until puffed, set, and golden brown on the bottom. Bake, uncovered, in a 325° oven for 8 to 10 minutes or until a knife inserted near the center comes out clean.
3 Meanwhile, prepare Creole Sauce. Loosen side of the omelet with a metal spatula. Make a shallow cut slightly off-center across the omelet. Fold smaller side over the larger side. Transfer to a warm platter. Lift edge of omelet and fill center with Creole Sauce.