We used to use a big aluminum dishpan. Any broader-than-it-is-deep cooking vessel will do. I have used a Dutch oven, but you have to stir constantly to get the bottom layers up to the top. I finally settled on my big enameled turkey roaster pan.
I don't season at all. I may add a little water if it seems like it wants to stick. Then when I'm ready to cook, I add butter, salt and pepper.