Polenta is a great ingredient for easy, back-pocket cooking. It’s plain enough to be malleable to many directions, and it takes easily to rich, salty flavors like Parmesan, like in this simple dinner. Topped with a saucy mushroom-tomato-thyme mixture and the combination is reminiscent of pizza, but in an elevated way. If you want to turn this into a bigger dinner for a crowd, spread the polenta out on a greased baking sheet and top with the mushroom mixture to serve family style. Add on some fresh bread and a peppery arugula salad and you’ve got an elegant dinner party in less than an hour.