Preparation

• Preheat the oven to 375.
• Cut the potatoes into slices about 1/8" think.
• Cut the leeks in half lengthwise, then into very thin slices.
• Butter a shallow, round 10" baking dish.
• Arrange a layer of potato slices in the pan in overlapping circles.
• Brush with about one fourth of the melted butter.
• Top with about half of the leeks and half of the thyme.
• Season with salt and pepper.
• Repeat with another layer of potatoes and the remaining leeks and thyme.
• Top with a final layer of the best looking potato slices.
• Brush the top layer with about one fourth of the melted butter and lightly sprinkle the cinnamon on the top.
• Cover the pan with aluminium foil.
• Place a heavy skillet or baking dish on top to press the potatoes into a compact mass.
• Bake for 30 minutes.
• Remove the skillet and foil and baste the top layer with the remaining butter.
• Continue baking for about 30 minutes, until the potatoes are very soft and the top and bottom layers have started to caramelize.
• If the potatoes begin to char, cover the top with foil.
• Cool for 15 minutes before serving Serves 4 to 6.