Lettuce cups: Add sesame oil to a large wok over medium-high heat. Add chicken, garlic and ginger. Cook for about 3-5 minutes. Add tamari, Hoisin Sauce and NAKANO Natural Rice Vinegar. Continue cooking for 3-5 minutes until chicken is cooked through. Stir in green onion, peanuts and water chestnuts. Divide mixture among lettuce cups and top each with sesame seeds and fresh cilantro.