Potato Gratin With Parmesan and Caramelized Onions
5.0(5)
I love these potatoes! So delicious, and very easy to put together!!!
Edited to change pan size! Originally stated 9-in pie plate. Personally I find a 9 x 9 square pan works better, just make sure to use a deep dish pan!
04Coat a 9-in x 9-in square baking (deep dish) pan with cooking spray.
05Arrange half of the potato slices in the pie pan, overlapping them slightly, and season with salt and pepper. Top with the onions and half of the Parmesan cheese. Cover with the remaining potato slices.
06In a bowl, combine the egg whites, whole eggs, skim milk, dry milk and nutmeg and season with salt and pepper. Pour the custard over the potatoes and sprinkle the remaining Parmesan on top. Bake the gratin for about 45 minutes, or until the custard is set and the top is golden. Let the gratin rest for 10 minutes before serving.