Heat A Wok Or Heavy Soup Pot On High Heat For 30 Seconds. Add The Oil & Swirl To Coat. Add Garlic, Leeks, Carrots & Lower To A Simmer & Cook, Covered For 10 Minutes. Stir Occasionally. Uncover Wok, Increase Heat To High & Add Spinach & Water Chestnuts. Stir-Fry For 2 Minutes. Lower Heat To Medium. Add Warmed Stock, Tamari & Rice Vinegar. Season To Taste.