INGREDIENTS
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½ cup vegetable oil
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¼ cup red wine vinegar
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½ cup firmly packed dark brown sugar
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½ cup low sodium soy sauce
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2 cups ketchup
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1 teaspoon garlic powder
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1 large onion, chopped
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2 tablespoons Worcestershire sauce
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5-pound pork roast, fat trimmed
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Hamburger Buns