Quick Potato Casserole

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 9x13 casserole dish.

Sprinkle Parmesan over top...probably about 1/4 cup or so.

Bake for 1 hour at 400 degrees F.

This can be doubled easily.

Also can be prepared in advance and baked just before serving.