Sauce:
1/4 cup soy sauce
1/4 cup rice wine
1/2 cup water
1 Tbsp. cornstarch
1 Tbsp. sugar
1 Tbsp. sesame oil
1 tsp. Worcestershire sauce
1 Tbsp. orange rind, grated
1 clove garlic, minced
1 Tbsp. fresh ginger, grated
1/4 cup fresh orange juice
1 tsp. red pepper flakes

Combine sauce ingredients and mix well. Set aside. Cut London broil into 1 inch pieces and trim away fat. Heat oil in a large skillet or wok and brown beef. Remove beef and set aside. Stir-fry snow peas for several minutes until crisp-tender. Add water chestnuts and then sauce ingredients and beef and stir-fry until sauce thickens. Serve hot with hot rice.