Soy sauce is made from fermented soybeans and roasted wheat or barley. It is an important flavoring ingredient in Asian recipes as well as American and other international dishes.These recipes all use soy sauce as an ingredient.oy sauce, Worcestershire sauce, ginger, garlic, and red wine give this pork and oyster dish an Oriental flavor. The oysters go in last so they do not get rubbery from overcooking. Plan ahead to marinate pork for 1 hour before cooking.