Certified Gluten-Free. Non-GMO. Non GMO Project verified. nongmoproject.org. Est. 1804. Make Mongolian Beef at home! San-J's Mongolian Sauce has a rich taste from tamari Soy sauce. it's the perfect blend of sweet and savory with accents of ginger and garlic. San-J is a Brewer of Premium Tamari, established in 1804, Japan. No artificial preservatives or additives. Approved Food Product Foodmat Friendly. www.san-j.com.