I made the version from Tyler's Ultimate last fall. His version calls for butternut squash or pumpkin, I saw the episode but I can't remember which he used on TV. www.foodnetwork.com/recipes/tyler-florence
I didn't really like it. I ended up throwing most of it away because my husband hated it! To be fair I did change the recipe a bit. I omitted the chestnuts because they were just too expensive and I used low fat riccota and less cheese.