Turkey lettuce wrap

serves 8 1 lb ground turkey 2 tbsp peanut oil 1/2 c water chestnuts, chopped finely 1/4 c carrots, finely choppes 1/4 c celery, chopped finely 1/4 c shiitake mushroom, sliced 1/2 c scallions, chopped finely 1 medium onion, chopped finely 1 tbsp oyster sauce 2 tbsp hoisin suace 2 tbsp soy sauce (I used…