Brown pork in heavy bottom pan and transfer to slow cooker. Sauté onion until golden. Add vinegar and deglaze the pan. Then add ketchup, brown sugar, molasses, red pepper flakes, Worcestershire sauce, mustard, and 1 teaspoon each of salt and pepper. Cook, stirring occasionally until the mixture begins to bubble. Pour over pork. Cover and cook on high for 4-5 hours or low for 8-10 hours. The pork should be very tender.

Transfer the pork to a platter. Using a pair of forks, shred each piece of pork, removing and discarding any large pieces of fat. Skim off the excess fat from the surface of the sauce and return pork to the sauce. Stir together to combine. Serve the pork and sauce as is or on sandwich rolls.

* If like me you don't have a slow cooker, you can use a French oven on the stove top instead.

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Tastes even better the next day!