This is (finally) a healthy way to have scalloped potatoes. I just love recipes that mimic a heart-attack inducing white sauce.
Best-ever mushroom sauce
Salt & Pepper
Slice potatoes thinly, then layer 1/2 on bottom of casserole dish. Top with dabs of butter, salt and pepper. Cover with 1/2 of mushroom sauce, then repeat. Bake in 180 oven for 60 minutes, or until sauce has thickened and potatoes are tender.