Cook pork roast with minced garlic and 1 onion in a Crock Pot for 8 hours, or until meat falls off bone.
Remove excess fat and bone; and drain some of the juice. Add sauce and the second onion (additional garlic may also be added at this time).
Cook additional 3-4 hours. Season to taste with salt and pepper.
May be cooked overnight during the first 8 hours.