Cheesy Potatoes

7 large potatoes or frozen hashbrowns
1 can cream of chicken
1 c. sour cream
1 c. shredded cheese
1/3 c. chopped green onions
2 T. melted butter
1/2 c. milk

Toppings:
1 c. cornflakes, crushed
1/2 c. Parmesan cheese
2 T. melted butter

Bake at 350 degrees for 30 minutes.