Creamy tomato pierogi casserole is a super simple five ingredient recipe perfect for busy weeknights. Pierogies are those big pasta half moons stuffed with potatoes and onions or cheese. You can usually find them near the frozen potatoes in your grocery store. They are wonderful in casseroles or just boiled and topped with pasta sauce or pesto. This super simple casserole recipe takes about 5 minutes to put together. Then it just bakes in the oven, so you hardly have to do any work at allServe it with a green salad tossed with some grape tomatoes and avocados and a nice glass of wine after a hard day at work or school.