INGREDIENTS
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1/4 cup mayonnaise
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2 tablespoons ketchup
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2 tablespoons finely chopped dill pickle spears, optional, plus whole spears for serving
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Kosher salt and freshly ground black pepper
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8 thick-cut slices sourdough rye bread (12 ounces), or your favorite hearty bread such as rye, country white or Texas toast
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8 slices Swiss cheese
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4 slices Jarlsburg cheese
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1 pound thinly sliced deli corned beef
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1 pound thinly sliced deli pastrami
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1 1/2 cups prepared sauerkraut, rinsed and drained (12 ounces)
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2 tablespoons extra-virgin olive oil