Making Crockpot Pierogi Casserole with Kielbasa is straightforward if you follow these easy steps:

1. Prepare Ingredients: Chop the onion and slice the kielbasa. Gather all the other ingredients.
2. Layer Ingredients in the Crockpot:
– Begin by adding half of the frozen pierogies to the bottom of the crockpot.
– Add half of the sliced kielbasa, half of the chopped onion, and half of the shredded cabbage.
3. Add Cheese: Sprinkle half of the shredded cheddar cheese over the first layer.
4. Create the Sauce: In a medium bowl, mix together the cream of mushroom soup, sour cream, milk, garlic powder, salt, and black pepper until smooth.
5. Repeat Layers: Pour half of the prepared sauce over the first layer, then repeat the layering process with the remaining pierogies, kielbasa, onion, cabbage, and cheese.
6. Top with Sauce: Pour the remaining sauce over the final layer.
7. Cover and Cook: Cover the crockpot and cook on low for 6-8 hours or on high for 3-4 hours, until the pierogies are tender and the cheese is melted and bubbly.
8. Garnish (Optional): Just before serving, you can add fresh herbs like parsley or chives for a burst of color and extra flavor.
9. Serve: Stir gently to combine everything before serving.

By following these steps, you’ll create a delightful Crockpot Pierogi Casserole that will leave everyone asking for seconds!