Pour in the sauce and cook 1 to 2 minutes more, until the sauce reduces slightly and the chicken is cooked through completely. Turn off heat and stir in chestnuts and green onions. Season with salt and pepper.
Spoon a large scoop (about ¼ cup) of chicken mixture into the center of each lettuce leaf. Serve immediately.
Recipe by The Best Video Recipes for All at https://recipes-for-all.com/asian-lettuce-wraps/