In a large bowl, combine diced potatoes, kielbasa, cheddar cheese, sour cream, cream of mushroom soup, garlic powder, onion powder, pepper, and salt. Stir until well mixed.
Transfer the mixture to a greased casserole dish and spread evenly.
Cover with foil and bake for 45 minutes.
Remove the foil and bake for an additional 15 minutes until golden brown.
Let it cool for a few minutes before serving.
Notes
For added flavor, consider adding chopped onions and bell peppers.
This dish can be prepared in advance and stored in the refrigerator before baking.