Basic omelette: In an 20 cm skillet, over medium heat, melt margarine. Pour egg beaters into skillet. Cook, lifting edges to allow uncooked ortion to run underneath. When almost set, spoon desired filling onto half the egg. Fold other half over the top. Slide onto a warm plate. Serve immediately. For fillings: Cook ingredients in margarine until vegetables are tender. Per serving: 110 calories; 206 mg. sodium; 0 mg chol; 4 gm total fat; 0 gm sat fat.