Spread out your frozen pierogies in the bottom of a lightly greased casserole crock pot or 6 quart crock pot.
Place your sliced sausage (or kielbasa) evenly on top of your pierogies.
Put your cream cheese and sour cream in a mixing bowl and combine until smooth with an electric mixer.
Take a spoon and place dollops of the cream cheese mixture all around the top of your casserole. Then gently spread the dollops out with a stirring spatula until everything is covered. (You don't want the edges of your pierogies sticking out.)
Sprinkle your shredded cheddar evenly on top.
Cover and cook on high for 2 hours, turning your insert halfway through cooking if your slow cooker does not cook evenly.
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As with any of our recipes, carb counts, calorie counts and nutritional information varies greatly. As a result, your nutritional content depends on which products you choose to use when cooking this dish. The auto-calculation is just an automated estimate and should NOT be used for specific dietary needs.
All slow cookers cook differently, so cooking times are always a basic guideline. Recipes should always be tested first in your own slow cooker and time adjusted as needed.