Slow Cooker Hash Browns Casserole

I copied this from a lady at work. I'm not sure where she got it, but she said it was an easy way to make potatoes for brunch.

• Ready In: 5 hrs 5 mins
• Serves: 6

Ingredients

• 10  ounces  cream of mushroom soup
• 1⁄2 cup  finely chopped onion
• 1  cup fat free sour cream
• 1  teaspoon salt
• 1⁄4 teaspoon pepper
• 1  kg frozen hash browns
• 1  cup  grated sharp cheddar cheese
• 1  tablespoon butter
• 1⁄4 cup  corn flake crumbs

Directions

1. Stir first 5 ingredients in large bowl.
2. Add potatoes and cheese.
3. Place in crockpot and cover.
4. Cook on high 3-4 hours.
5. Melt butter in small frying pan.
6. Stir in cornflakes and cook until crisp.
7. Scatter over potatoes and serve.