Step 1

Rub salt and pepper over roast; transfer to a 5- or 6-qt. slow cooker. Combine ketchup, hoisin and chili sauce; pour over roast. Top with mushrooms, onion and pineapple. Cook, covered, on low until pork is tender, 6-8 hours.

Step 2

Remove roast; cool slightly. Strain cooking juices. Reserve vegetables and 1/2 to 1-1/2 cups juices; discard remaining juices. Skim fat from reserved juices. Shred pork with 2 forks. Return pork and reserved vegetables slow cooker; pour desired amount of reserved cooking juices over pork mixture and stir to combine. Stir in water chestnuts; heat through. Serve in lettuce leaves; top with green onions, if desired.