Spring onions are those that have been harvested early-they look like scallions with large white bulbs. If they're unavailable, use Vidalia onions. Rotini (corkscrew pasta) will work in place of fusilli.
This Baked Mashed Potatoes, with Pancetta, Parmesan Cheese, and Breadcrumbs recipe contains russet potatoes, pancetta, butter, freshly grated Parmesan, shredded mozzarella and more.