Kielbasa With Pierogies & Caramelized Onions - cooking recipe

Ingredients

3 tablespoons olive oil, divided
1 large yellow onion, thinly sliced
1 lb frozen potato and cheddar pierogies, do not thaw
1 lb kielbasa, sliced, any variety will work
2 tablespoons apple cider vinegar
2 tablespoons whole grain mustard
fresh parsley, chopped for garnish (optional)

Preparation

In a large saucepan, heat 2 T olive oil over medium heat. Add onions, stirring occasionally, until they turn a golden color, about 15-20 minutes. Spread pierogies on top of onions in a single layer. Lower heat to medium, cover pan and let cook another 5 minutes, stirring every other minute. Add sausage slices and continue to cook, stirring occasionally, until pierogies and sausage are cooked through and starting to turn golden brown.
Meanwhile, in a small bowl, stir together vinegar, mustard and remaining 1 T olive oil.
Add dressing to pan with the sausages, pierogies and onions and toss to combine. Season with salt and pepper, if needed. Place on a serving platter and garnish with parsley.