01 -
Bring a large pot of water to a boil. Add the frozen pierogies and cook for 4–5 minutes, or until they float to the surface.
02 -
While the pierogies cook, heat olive oil in a large skillet over medium-high heat. Add the sliced chicken sausages and sauté for 2–3 minutes, until browned and slightly crisp on the edges.
03 -
Stir in the sliced onion and cook for another 2–3 minutes, until the onions soften slightly.
04 -
Once the pierogies are cooked, use a slotted spoon to transfer them directly to the skillet with the sausage and onions. Spread them out in the pan so one side of each pierogi touches the skillet's surface.
05 -
Add the butter in small pieces around the skillet. Cook for an additional 4–5 minutes, tossing occasionally, until the pierogies are lightly browned in spots.
06 -
Garnish with fresh parsley, if desired, and serve warm.