To Prepare for Group:Combine ketchup, soy sauce, vinegar, and sugar in sandwich bag. Bag pork roast. Place sandwich bag in bag with roast. Label pineapple.
Cooking Day: Brown the pork roast on all sides and put it in your slow cooker. Drain pineapple.Mix pineapple with sauce and bring it to a boil, then pour it over the meat. Cook on low for 4 hours or until very tender (spoon the sauce over the meat every once in a while).
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