Amelia Saltsman is using Alex Weiser's parsnips to make a creamy puree. Amelia Saltsman is the author of The Santa Monica Farmers Market Cookbook. Alex Weiser of Weiser Family Farms are known for their incredible potato varieties as well as many other items.
See pictures of Alex's stand here. A recipe for Amelia's parsnip soup is here. Her recipe for Brussels sprouts is here.