My great-aunt made this every Sunday during the depression and the tradition lives on in our family. So simple but the flavors are unreal!

or so of the flour mixture evenly over the onions.

Dot a few small pieces of butter (about 1 tablespoon total) over the top of the flour and onions. This helps the top of each layer get that buttery, golden finish as it cooks.

Repeat the layers—potatoes, onions, a light sprinkle of the flour mixture, and small dots of butter—until you’ve used all of the potatoes and onions. Try to finish with a potato layer on top, then dot the remaining butter