# What You’ll Need:
→ Main Ingredients
01 - 2 packages (32 oz) frozen potato and cheese pierogi
02 - 1 lb kielbasa, sliced into 1/2-inch rounds
03 - 1 medium yellow onion, thinly sliced
04 - 2 cups shredded cheddar cheese
→ Sauce
05 - 1 can (10.5 oz) condensed cream of mushroom soup
06 - 1 cup sour cream
07 - 1/2 cup whole milk
08 - 1/2 teaspoon garlic powder
09 - 1/4 teaspoon black pepper
→ Topping
10 - 2 tablespoons fresh chives or parsley, chopped
# Directions:
01 - Lightly grease the interior of a 6-quart slow cooker insert.
02 - Arrange half of the frozen pierogi on the bottom of the slow cooker. Top with half of the sliced kielbasa and half of the onions. Sprinkle 1 cup of shredded cheddar cheese over this layer.
03 - Repeat with remaining pierogi, kielbasa, onions, and the second cup of cheddar cheese.
04 - In a medium mixing bowl, whisk together the cream of mushroom soup, sour cream, milk, garlic powder, and black pepper until smooth and fully combined.
05 - Pour the prepared sauce evenly over the layered ingredients in the slow cooker, ensuring all layers are moistened.
06 - Cover the slow cooker and cook on LOW setting for 4 hours, or until the casserole is heated through and bubbling gently around the edges.
07 - Remove from heat and garnish with fresh chopped chives or parsley if desired. Serve immediately.