Pommes Anna — layered butter potatoes

Preheat the oven to 250°C. Peel the potatoes and cut them into uniformly thin slices. If using a mandoline, use its hand guard. Dry the slices well.

Brush the pan with some of the measured butter. Arrange overlapping potato slices in layers, brushing each layer with butter. Use the remaining butter on top.

Cover the pan with foil and bake for about 20 minutes. Remove the foil and continue for about 30 minutes, until browned on top and a knife passes easily through the potatoes.

If the top browns before the middle is tender, cover again and keep baking until tender. Let stand briefly before cutting into four portions.