Step 1

Preheat oven to 425°. Combine potatoes, bay leaves, and a few handfuls of salt in a large pot. Pour in cold water to cover potatoes by 2". Bring to a boil, then reduce heat and simmer until potatoes are fork-tender, 25–35 minutes.

Step 2

Drain and transfer potatoes and bay leaves to a large rimmed baking sheet. Coat evenly with duck fat; season with salt. Roast, shaking baking sheet once or twice, until golden and beginning to crisp, 25–30 minutes. Remove from oven and mix in scallions. Return to oven and roast until scallions are softened and browned at the edges and potatoes are golden brown and crisp, 10–15 minutes. Transfer to a serving dish.