Potato Crisps with Chive-Sour Cream Dip

Preheat the oven to 350 °. In a large saucepan over moderately high heat, heat the oil to 360 °. Fry the potato skins in batches, stirring occasionally, until browned and crisp, 2 to 3 minutes per batch. Using a slotted spoon, transfer each batch of potato strips to paper towels to drain, then sprinkle with salt immediately. Transfer the potato strips to a baking sheet and sprinkle them with the grated Parmigiano-Reggiano. Bake for 3 to 4 minutes, just until the cheese is melted. Let the crisps cool, then transfer to a bowl. In a blender or processor, puree the sour cream with the chives and a pinch of salt and pepper until the chives are finely chopped. Transfer the dip to a bowl and serve alongside the potato crisps.