Paleo Potatoes au Gratin

A holiday in my household isn’t complete without a casserole of potatoes au gratin. Many years ago we used to buy the stuff in the box (yuck!) and while that was WAY easier, it is really exciting to have figured out a healthier twist on this classic. Feel free to make this ahead of time, but if it goes into the oven cold it will take much longer to heat up in the oven. Don’t discard any leftovers - this gets better the next day!