PLACE pork in slow cooker. Add barbecue sauce; mix well.
DRAIN pineapple, reserving 1/4 cup of the juice. Add reserved juice to cornstarch; stir until well blended. Add to pork mixture; stir until well blended. Top with the pineapple chunks and peppers; cover with lid.
COOK on LOW for 6 to 8 hours (or on HIGH for 5 hours). Serve over hot rice. Sprinkle with the peanuts.