I grew up enjoying my mom's sweet potato casserole for every holiday and it was always a dish I just couldn't get enough of. There is something magical about comforting and creamy sweet potatoes with an ooey gooey toasted marshmallow
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.