Preheat the oven to 425°F.
Arrange sliced kielbasa sausage, cabbage, onion, and frozen pierogies evenly on a sheet pan.
Season the ingredients with salt and black pepper as desired.
Roast until the pierogies become golden and crisp and the cabbage and onions are tender, about 40 minutes.
While the sheet pan dinner cooks, prepare the vinaigrette by whisking together honey, Cajun seasoning, whole grain mustard, red wine vinegar, oil, and paprika until combined.
Remove the sheet pan from the oven and drizzle the vinaigrette over the roasted ingredients.
Toss gently to coat everything with the dressing.
Garnish with fresh parsley and dill.
Serve warm with sour cream on the side.