Creating Crockpot Pierogi Casserole with Kielbasa is effortless if you follow these clear steps:

1. Prepare the Ingredients: Slice the kielbasa and dice the onion.
2. Layer the Ingredients: Place half of the frozen pierogi in the bottom of the crockpot.
3. Add Kielbasa: Layer half of the sliced kielbasa and half of the diced onion on top of the pierogi.
4. Add Cheese: Sprinkle with half of the shredded cheddar cheese.
5. Repeat Layers: Add the remaining pierogi, kielbasa, onion, and top with the rest of the cheddar cheese.
6. Combine Sauces: In a separate bowl, mix together the sour cream, cream of mushroom soup, beef broth, garlic powder, salt, and pepper.
7. Pour Sauce: Pour the sauce mixture evenly over the layered ingredients in the crockpot.
8. Cook: Cover and cook on low for 4-6 hours or on high for 2-3 hours, until everything is heated through and bubbly.
9. Serve: Once done cooking, garnish with fresh parsley if desired, and serve warm.

These simple steps will lead to an incredible outcome that is sure to satisfy your appetite.