Crockpot Hashbrown Casserole (NO cream of soups)

INGREDIENTS

3 tbsp

butter

1/4 cup

finely chopped mushrooms

1/4 cup

finely chopped yellow onion

1/4 tsp

garlic powder

3 tbsp

flour

1 cup

milk (I used 1%)

1/2 cup

sour cream (I used reduced-fat)

1 20 ounce package

Simply Potatoes shredded hashbrowns

3 cups

freshly shredded sharp cheddar cheese

Salt and pepper (I used about 1 tsp. salt and a heaping 1/4 tsp. pepper)

Optional toppings: Cooked and chopped bacon, fresh parsley