Cauliflower Gratin

I saw this recipe on the Food Network and it was super yummy. Even Brian, who doesn't eat brocolli or cauliflower, liked it! It's like a cauliflowerly mac and cheese. I used mozzarella instead of gruyere and would use less red pepper flakes next time. It was quite spicy!

http://www.foodnetwork.com/recipes/cauliflower-gratin-recipe/index.html