1 lb Hash brown potatoes; frozen
1/2 ts Onion powder
1 c  Sour cream
1 c  Cream of mushroom soup
1 c  Cheddar cheese; shredded
Parmesan cheese

Mix all ingredients together except Parmesan. Put into greased 9×13
casserole dish. Sprinkle Parmesan over top…probably about 1/4 cup or so.
Bake for 1 hour at 400~. This can be doubled easily. Also can be prepared
in advance and baked just before serving.