Quick Potato Casserole

Ingredients

1 pound hash brown potatoes
1/2 teaspoon onion powder
1 cup sour cream
1 cup cream of mushroom soup
1 cup cheddar cheese
1 parmesan cheese

Instructions

Mix all ingredients together except parmesan. Put into greased 9x13 casserole dish. Sprinkle parmesan over top, about 1/4 cup or so. Bake for 1 hour at 400 degrees.

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