INGREDIENTS
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1 large sweet onion, chopped
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3 (8-ounce) packages of cream cheese, softened
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2 cups freshly grated parmesan cheese
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1/2 cup mayonnaise
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1/2 teaspoon cayenne pepper, plus more to taste
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1/4 cup finely chopped fresh chives, plus more for garnish
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Kosher salt and freshly ground black pepper