Ingredients

1 cup (2 sticks) unsalted butter

3 Idaho potatoes, peeled and very thinly sliced crosswise

1 tablespoon fresh thyme leaves

1 tablespoon fresh rosemary leaves

Sea salt

1/2 teaspoon coarsely ground black pepper

1 clove garlic, thinly sliced

Preparation

Preheat oven to 450 degrees.

Place butter in a large heatproof bowl, set over (but not touching) simmering water. When butter is melted, add potatoes and stir to coat. Add thyme, rosemary, 1/2 teaspoon sea salt, pepper, and garlic. Cook, stirring occasionally, until potatoes are translucent, about 20 minutes.

Layer potatoes in two 2-inch deep, 5-by-7-inch baking dishes, taking care not to break the potatoes. Transfer to oven and bake until top is crisp, about 30 minutes. Season with salt and serve immediately.