Step 1

Preheat your grill to medium heat and spray with non-stick grill spray.

Step 2

Add the kielbasa to the grill and cook, covered, for 4 minutes.

Step 3

In a bowl, toss the frozen piergoies with 2 Tbsp. olive oil, until evenly coated.

Step 4

Flip the kielbasa and add the onion and frozen pierogies to the grill. Cook, covered, for 10 minutes, turning everything halfway.

Step 5

While everything cooks, whisk together the remaining 2 Tbsp. olive oil, mustard, and cider vinegar. Season to taste with salt and pepper.

Step 6

When everything is done cooking, transfer the pierogies to a clean bowl. Transfer the onion and kielbasa to a cutting board.

Step 7

Roughly chop the onion and add to the bowl with the pierogies.

Step 8

Coin-slice the kielbasa and add to the bowl with the pierogies and chopped onion.

Step 9

Pour the mustard sauce over the pierogies, onion, and kielbasa and toss to evenly combine.

Step 10

Serve immediately.