Cauliflower and Potato Gratin

Chef Conor Esser at Kitchen Door in Napa gives us this fantastic potato au gratin recipe incorporating one of his favorite winter vegetables: cauliflower. Chef says, “As a child, I always loved when my mom would make potatoes au gratin, often my favorite part of holiday meals…Cheers, and Happy Holidays!” Ingredients  1 small head cauliflower, 1.5-2 lbs, washed…