• 1 tablespoon plus 2/3 cup (or more) olive oil
• 6 ounces guanciale (salt-cured pork jowl), pancetta, or slab bacon, cut into 1/3-inch cubes
• 2 bunches ramps (about 10 ounces), greens and bulbs separated, bulbs thinly sliced
• 1/3 cup finely chopped unsalted roasted pistachios, divided
• 1/2 cup finely grated Parmesan, plus more for serving
• Freshly ground black pepper
• 12 ounces paccheri or rigatoni
• 3 tablespoons unsalted butter, room temperature, cut into pieces