"An Open-faced Reuben Sandwich is an easy weeknight dinner and a quick way to have your corned beef on Saint Patrick's Day!..."
INGREDIENTS
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3 Tbs. mayonnaise
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4 1/2 tsp. ketchup
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1/2 tsp. red wine vinegar
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1/8 tsp. pepper
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1 Portuguese roll (, halved lengthwise and toasted)
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8 ounces deli-sliced corned beef ( or pastrami)
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1 cup sauerkraut
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4 ounces deli-sliced Swiss cheese