Sliced sweet potatos
Veggies (e.g. Caramelized onions, Roasted cauliflower, Butternut squash, Spinach, zuchinni, etc)
Cheese (e.g. mozzarella, asiago, romano)
I started with very thinly sliced sweet potato, then each layer a different veg, sprinkling grated cheese in between and ending with the sweet potato on top.
I used a 6 inch springform pan that was deep and allowed me to have many layers, just remember to press down in between, place the pan on a baking sheet so you won’t have drips in your oven when cooking and cover the top with foil. Roast at 425 for 20 minutes, then take the foil off and roast another 15 minutes until the top is golden. Let it rest for 30 minutes before you slice it into wedges.
http://www.prouditaliancook.com/2012/01/winter-vegetable-torte.html