Prep Time 15 minutes minutes
Cook Time 1 hour hour 20 minutes minutes
Total Time 1 hour hour 35 minutes minutes
To make ahead, prepare the potatoes as directed and place in the baking dish. Dot with butter and then cover tightly with plastic wrap. Refrigerate for up to 3 days. To bake, remove from the refrigerator and uncover one hour before cooking and then bake as directed.