* Liver should be sliced from 1/4 to 1/2-inch thick. ~- ~- Cut liver into serving pieces. Mix onions, oil, pepper and sage in 1-qt casserole. Cover and microwave on high (100 until onions are crisp tender, 4 to 6 minutes. Brush liver with soy sauce. Arrange with thickest pieces to outsied in 9- inch pie plate. Spoon onions evenly over liver. Cover tightly and microwave on high (100%) 3 minutes; turn pie plate one-half turn. Micro- wave until liver is no longer pink, 1 to 3 minutes (do not overcook). Let stand 3 minutes. (Liver will continue to cook while standing.) Sprinkle with lemon juice and parsley just before serving.