Pulled Pork

INGREDIENTS

• 3 Tbs. canola or corn oil
• 4 lb. boneless pork shoulder, cut into 3 equal pieces
• 1 yellow onion, finely chopped
• 3/4 cup cider vinegar
• 3/4 cup tomato ketchup
• 1/3 cup firmly packed brown sugar
• 1/4 cup light molasses
• 2 tsp. red pepper flakes
• 1 Tbs. Worcestershire sauce
• 1 tsp. dry mustard
• 1 tsp. salt
• 1 tsp. freshly ground pepper
• Soft sandwich rolls, split and toasted, for serving