2. Pour in the onion, garlic, ginger, soy sauce, hoisin sauce, soy sauce, vinegar, and the Sriracha. Toss the mixture to coat all of the chicken. Continue cooking until the chicken is thoroughly cooked (about 1-2 minutes).
033. Stir in the water chestnuts and the green onions. Pour in the sesame oil, and add salt to taste.
044. Transfer the chicken to a bowl or a large plate. Scoop the chicken mixture onto the lettuce leaves. Garnish with cilantro if desired and serve!