Spread about 1/3 of the potato slices on top of the butter. See notes below for cooking in round pan.
When I originally wrote this recipe, I wrote it out with the methods I usually use. However when I photographed it, I made it differently. Either way will result in a delicious gratin.
If using a round pan, simply arrange the potatoes in a circular motion on top of the butter until pan is full. Sprinkle with garlic, cheese, salt, and pepper, then drizzle with cream. Bake until potatoes are golden, bubbly, and tender.