Onion Beef    Ingredient A     1½ lbs. Beef Flank       Ingredients B   4 Tbs. Soy Sauce 1 Tbs. Red Wine 3 Tbs. Brown Sugar ½ tsp. Baking Soda 2 tsp. Corn Starch ¼ tsp. Black Pepper       Ingredients C   2   Yellow Onion (medium size, sliced) 1 Cup Green/Red/Yellow Bell Pepper (optional, sliced)       Other Ingredient       Cooking Oil   Thinly slice Beef Flank and marinate in Ingredients B for at least 1 hour before cooking. Pour about 1 Tbs. of cooking oil over beef and stir well right before cooking. This will allow the flavor to stay with the meat while cooking. Pour 3 Tbs. cooking oil in the wok. Stir fry beef. Remove beef from heat when 80% done (still see slight red in meat). Stir fry onion in the same wok. When onion is soften, add in beef, and if desired, add in bell peppers. Stir fry for another minute or two. Then remove from wok and serve over rice.