Preheat your oven to 400°F (200°C) and grease a rimmed cookie sheet with olive oil or non-stick spray.

In a bowl, combine the shredded cabbage with olive oil, salt, black pepper, and granulated garlic. Toss until well coated.

Spread the frozen pierogies onto the greased cookie sheet, drizzle with olive oil, and add a pinch of salt.

Slice the kielbasa and arrange it around the pierogies. Pile the seasoned cabbage in the remaining space.

Bake for 15 minutes, then stir the cabbage and flip the pierogies for even cooking.

Return to the oven and bake for an additional 15 minutes until pierogies are golden brown and cabbage caramelizes.

Remove from the oven, let cool for a minute, and serve warm.