Slice potatoes. Chop a handful of sage. Chop 2 cloves of garlic. Grate 1 cup of Parmesan cheese.
Put sliced potatoes in a baking dish sprayed with cooking spray. Add Parmesan cheese, ½ pint of Half & Half, ½ pint of milk, and salt and pepper to taste. Sprinkle more Parmesan cheese on top.
Bake at 350° for 30 minutes or until golden.