Flavorful Beef Stir-Fry - cooking recipe

Ingredients

1 1 lb sirloin steaks or 1 lb beef tenderloin steak, sliced thin
assorted chopped vegetables (bell peppers, carrots, celery, bean sprouts, mushrooms, bamboo, broccoli, etc.)
tofu, cubed (optional)
Marinade
3 tablespoons sherry wine or 3 tablespoons apple juice
1 1/2 tablespoons soy sauce
2 teaspoons oyster sauce
1 teaspoon cornstarch
1/2 teaspoon baking soda
1/4 teaspoon salt
1 clove garlic, crushed
1 inch fresh ginger, peeled and sliced or grated
Sauce
1/2 cup water
2 teaspoons cornstarch
1 tablespoon oyster sauce
1 tablespoon ketchup
1 tablespoon soy sauce
1/2 teaspoon five-spice powder (optional)

Preparation

Combine beef and marinade in zipper-type plastic bag.
Marinate in refrigerator at least 3 hours.
Heat 2 T oil in wok.
Stir-fry/pan-fry the meat in 2 batches until cooked through.
Remove meat to a warm dish.
Add chopped vegetables and a bit of oil to wok.
Stir-fry until crisp-tender.
Return meat to wok.
Add tofu if desired.
Stir-fry until heated through.
Add sauce; cook to desired thickness.
Serve with steamed jasmine rice, if desired.