Uses a flour tortilla for the crust. Red onions stirfried in balsamic vinegar & olive oil. Ricotta cheese. Asiago cheese (optional; use others too). Mushrooms, any kind you like.
There are many ways to make delicious scalloped potatoes. For this version, I consulted several books - Kitchen Sense, two James Beards, and the Joy of Cooking. Basically you layer thinly sliced potatoes with any number of extras - cheese, onions, parsley