Crockpot Potatoes Au Gratin

(~5 potatoes) very large Yukon Gold or Russet Potatoes (peeled and sliced)

Lots of seasoned salt and fresh cracked pepper

butter

white flour

minced garlic

onion powder

and 1/2 cups milk (I used 1%)

sour cream (I used low-fat)

and 1/2 cups sharp freshly grated cheddar cheese*

Fresh parsley or chives