Black Pepper Beef

1/2 lb. boneless skirt or flank steak, cut into 3-inch strips

3 teaspoons Seasoning Sauce, divided

2 teaspoons cooking sherry or rice wine

1 1/2 teaspoons garlic powder

1/4 cup water

2 teaspoons cornstarch

2 teaspoons ketchup

1 to 1 1/2 teaspoons ground black pepper

1 teaspoon sesame oil

1 tablespoon vegetable oil

1 red bell pepper, cut into 1-inch pieces

1/2 medium white onion, cut into strips

Steamed white or brown rice