"Your favorite Rueben sandwich, but on a pizza! From Bon Appetit, July 1998. Posted for ZWT 7...."
INGREDIENTS
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1 tablespoon olive oil
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1 large onion, sliced
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1 teaspoon caraway seed
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1 1/2 cups packed sauerkraut, well-drained
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1 tablespoon sauerkraut juice, reserved
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1 1/2 cups packed shredded swiss cheese
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16 ounces purchased fully baked thick pizza crusts
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3 tablespoons Dijon mustard
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8 ounces fully cooked kielbasa, thinly sliced into rounds