Chopped Barbecue

• 2 onion (finely chopped)
• 1 green bell pepper cored
• 800 gr pork shoulder roast bone in
• 650 gr pork roast
• 475 ml barbecue sauce
• 180 ml vinegar (white)
• 18 gr pepper flakes chrushed (red)
• 6 gr salt
• 3 gr black pepper (freshly ground)