Cook ground beef in medium skillet, over medium heat until almost cooked through. Add carrots, mushrooms, water chestnuts, green onions and garlic. Continue cooking for 1 to 2 minutes until beef is completely cooked and vegetables are tender.

Add the hoisin sauce, soy sauce, rice wine vinegar and chili paste. Stir and let simmer 1 to 2 minutes.

Serve on lettuce leaves