Combine butter, soup, half the bottle of dressing, 2 handfuls of
cheddar cheese, 3 sprinkles of parmesan cheese.
Mix in potatoes
Make sure everything is evenly spread.
Cover top with a thin layer of cheddar cheese
Bake at 350 - 400 for about 1 hour or until top is golden and bubbly.
(I usually put it in the broiler of a minute to make the top extra brown.)