
Few side dishes deliver the kind of satisfaction that comes from a potato with a genuinely shattering crust and a fluffy, cloud-like interior. The secret here is a two-step process — parboiling the chunks until their edges turn ragged, then shaking them dry in the pot to rough up the surface before they ever hit the pan. That shaggy texture is everything: it creates maximum surface area for the hot fat to grab onto, which is what produces that deep, crackling exterior. Duck fat, goose fat, or beef tallow each bring their own rich, savory depth, though good olive oil works beautifully if that's what you have on hand. Crushed garlic cloves and fresh rosemary or thyme roasted alongside the potatoes perfume the whole tray without any fuss. Every single ingredient here is naturally free of gluten, so there's no need to audit labels or swap anything out — just straightforward, honest cooking with pantry staples. Pull these out of the oven golden and crackling, season immediately with flaky sea salt, and get them to the table fast.
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Preheat the oven to 425°F (220°C). Place the fat in a large rimmed baking sheet and set it in the oven while it preheats.
Place the potato chunks in a large pot, cover with cold water by at least 1 inch, and add the kosher salt. Bring to a boil over high heat, then reduce to a vigorous simmer and cook for 10–12 minutes, until the edges are just beginning to look ragged and a knife tip meets slight resistance at the center — the potatoes should not be fully cooked through.
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