"You may even want to make extra just for these...."
INGREDIENTS
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1 ounce Parmesan cheese, grated (about 1/2 cup)
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2 tablespoons chopped fresh chives
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1 large egg
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2 cups cold mashed potatoes
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1/2 cup all-purpose flour, divided
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2 tablespoons olive oil, divided
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Sour cream, for serving (optional)