Pierogi are classic Polish dumplings, made by wrapping dough around a savory filling and then boiling. This quick and easy, semi-homemade meal takes advantage of store-bought frozen pierogi for a no-boil, one-pot dish that comes together in about 40 minutes. Sweet caramelized onions, pan-browned kielbasa sausage, and a sprinkle of fresh herbs make this quick, cozy dish pop on the plate. For the best results, you'll need a 12-inch nonstick frying pan. If you don't have a nonstick pan this big, you can use a regular frying pan, but you'll need more oil, you'll have to handle the pierogi carefully, and they may break apart a bit. The recipe is a Yummly original created by Tory L. Davis.