
Heat 1 tbsp butter and the oil in a large nonstick skillet, add the frozen pierogies in a single layer, cover and cook 5 minutes.
Flip them and cook uncovered 3-4 minutes more until golden on both sides; move to a plate.
Add the remaining butter and the sliced onion and cook 5 minutes, then add the kielbasa coins and cook 5 minutes until browned.
Return the pierogies and toss everything together.
Serve with sour cream and sliced green onions.
Photo: DinnerDrop