over the surface. This top layer is what will get those crispy browned spots and golden edges.
Cover the slow cooker with the lid and cook on HIGH for 3 1/2 to 4 hours or on LOW for 6 to 7 hours, until the potatoes are very tender when pierced with a fork and the onions are soft and lightly caramelized. Avoid lifting the lid during the first few hours so the heat and steam stay trapped inside.
Once the potatoes are
