Yes, potatoes are naturally gluten free, but the boxed scalloped potatoes contain gluten and most of the cream of something soups contain gluten, so you really have to think before preparing your gluten free food. Fortunately, this is easy and wonderful.
8 potatoes sliced thin - you don't have to peel them.
1 can Progresso creamy mushroom soup - which is gluten free.
1 1/2 onion
a few sprinkles (very light) of garlic salt. Check the label on this, it may contain wheat.
10 slices american cheese or 1/2 cup cheddar cheese.
Cover with foil.
Bake at 375°F for approximately 1 hour or until potatoes reach desired texture.
For a crispy top layer, uncover during the last 10-15 minutes of cooking time.
My family has been begging for these.