To prepare sauce, combine brown sugar and cornstarch in saucepan. Stir in the 2/3 cup cold water and lemon juice. Cook
quickly, stirring constantly, till thickened and bubbly. Add apples; stir gently. Cover and simmer gently for 3 to 5 minutes
or till apples are tender. Add the 2 tablespoons margarine and sausage. Stir till butter melts and sausage is hot; keep warm.
To prepare omelet, beat egg whites till frothy; add water and salt. Beat egg whites till stiff peaks form. Beat egg yolks
till very thick and lemon-colored. Gently fold yolks into whites.
Heat the 1 tablespoon butter in 10-inch oven-proof skillet till a drop of water sizzles when dropped atop. Pour in egg
mixture and spread evenly with spatula, mounding higher at sides. Cook over low heat for 8 to 10 minutes or till lightly browned.
Bake in 325° oven for 8 to 10 minutes or till knife inserted near center comes out clean. Loosen sides of omelet with spatula.
Make a shallow cut across omelet, cutting slightly off-center so that the two portions are unequal. Fold smaller portion over
larger portion. Using spatula, slip omelet onto hot serving platter.
Set aside 2 cup of the apple mixture. Unfold omelet and spoon remaining apple mixture across center; re-fold. Pour the
reserved apple mixture atop.