Slow Cooker Pierogi Casserole with Kielbasa

Ingredients

• 1 (16 oz) package of frozen pierogi (potato and cheese or your choice)
• 1 lb kielbasa (Polish sausage), sliced into half-moons
• 1 large onion, finely chopped
• 2 cups shredded sharp cheddar cheese
• 1 cup sour cream
• 1 cup chicken broth
• 2 cloves garlic, minced
• 2 tsp dried parsley
• 1 tsp dried dill
• ½ tsp black pepper
• ½ tsp salt
• 1 tbsp olive oil
• Fresh chopped parsley (optional, for garnish)
• Additional sour cream (optional, for garnish)