Flank Steak with whites

1 lb linguine 1 lb flank steak, cut across the grain in thin 1/4 inch thick slices 1 tablespoon cornstarch 1 tablespoon dry sherry 1 pinch sugar 1 tablespoon[...]

2 tablespoons butter or 2 tablespoons margarine 1/4 cup finely chopped onion 1 clove garlic , crushed or minced 1 1/2 tablespoons flour 1/2 teaspoon dried[...]