Creating this delicious Crockpot Pierogi Casserole with Kielbasa is straightforward when following these simple steps:

1. Layer Ingredients: Start by placing half of the frozen pierogi at the bottom of the crockpot.
2. Add Kielbasa: Layer the sliced kielbasa over the pierogi.
3. Onion: Sprinkle the chopped onion evenly over the kielbasa.
4. Season: Sprinkle garlic powder, onion powder, salt, and pepper over the layers.
5. Prepare Sauce: In a bowl, mix the sour cream and cream of mushroom soup until smooth.
6. Layer Cheese: Pour half of the sauce mixture over the layered ingredients, then top with half of the shredded cheddar cheese.
7. Repeat Layers: Place the remaining frozen pierogi on top, followed by the rest of the kielbasa and onions, the remaining sauce mixture, and then the rest of the cheese.
8. Cook: Cover the crockpot and cook on low for 4-6 hours or on high for 2-3 hours. The dish is ready when the cheese is melted, and the pierogi are tender.
9. Check Texture: If desired, stir gently before serving to combine layers.
10. Serve: Garnish with freshly chopped parsley, if using, and serve warm.

These clear steps provide a seamless cooking experience that’ll have your family savoring every bite of this casserole.