Cook the beef, onion,garlic till almost done and drain meat,put back in skillet,and chop the meat finely with masher or spatchula, or use hand mixer, add the mushrooms, celery, carrots,onion,hoisin sauce, soy sauce, sesame oil, chopped peanuts, white pepper. Wash and dry, your romaine leaves, break of the white thick end of it and place the leaves in a circle on a nice platter, drop mixture by large table spoons onto your lettuce cups, and serve.