Cut liver into small strips; remove any membranes or veins. Roll liver strips in flour. Combine soy sauce, water and sugar in measuring cup. Heat bacon drippings in large skillet and sauté onion. Add liver strips, brown quickly, stirring constantly. Remove liver and onion to separate platter and lower heat, stir in soy mixture and cook until thickened. Add pepper, garlic salt, liver and onions, then serve over rice.