If you've never had a pierogi, you've got to try them. These Polish dumplings are made by filling unleavened dough with sweet or savory ingredients. They can be stuffed with anything from mashed potatoes to ground beef and sauerkraut. My favorite version is stuffed with farmers cheese, making them taste similar to a super doughy ravioli. Since I've had a love affair with pizza since childhood, the recipe below is my favorite way to cook pierogies: turn them into pizza casserole!
I never have time to make pierogies from scratch, so I keep a couple boxes of the frozen, pre-made pierogies around for occasions like this. They have a number of different flavors available, but I like the cheesy versions best for pizza casserole. Feel free to experiment with this recipe. You can substitute the sausage, pepperoni, bell pepper, and onion for your favorite pizza toppings.