Pittsburgh Ham Barbecues
Ingredients:
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½ cup butter
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1 small onion, finely chopped
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2 cups ketchup
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⅓ cup distilled white vinegar
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½ cup water
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3 tablespoons brown sugar
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2 teaspoons prepared yellow mustard
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2 tablespoons Worcestershire sauce
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1 ½ pounds chipped chopped ham
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8 kaiser rolls, split
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1 cup pickle relish