Cooking on LOW heat for a long time makes the meat extremely tender, so it shreds easily; HIGH heat yields a less tender product.
Trim roast and cut into 2-inch pieces. Stir together all ingredients in a 6-quart slow cooker.
Cover and cook on LOW 10 to 12 hours or until potatoes are fork-tender. Remove pork with a slotted spoon, and shred. Return shredded pork to slow cooker, and stir well. Ladle stew into bowls.
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