Cut liver into serving pieces. Place flour, garlic salt, paprika and pepper in plastic or paper bag. Shake liver in bag until well coated.
Melt shortening in medium skillet. Brown liver quickly on both sides, about 5 minutes. Remove to warm platter; keep warm while preparing Piquant Sauce. Add liver to sauce; heat through.
PIQUANT SAUCE INSTRUCTIONS:
In same skillet, cook and stir onion in shortening until onion is crisp-tender, about 2 minutes. Blend water, cornstarch, and soy sauce; pour into skillet. Cook, stirring constantly, until sauce thickens and boils. Boil and stir 1 minute.