
Heat the oven to 425°F.
Toss the frozen pierogi, sliced kielbasa, sliced onion, and shredded cabbage with the melted butter, salt, and pepper in a 9x13 dish or on a sheet pan.
Roast 25 minutes, stirring halfway, until the pierogi are golden and the cabbage is tender.
Sprinkle with cheddar and bake 5 more minutes.
Serve with sour cream and sliced green onions on top.
Photo: DinnerDrop