
Few side dishes inspire as much quiet excitement as a tray of roast potatoes done properly — shatteringly crisp on the outside, fluffy and steaming within. The secret here is a two-step process: par-boiling the chunks until their edges go ragged, then shaking them dry in the pot so the surface turns rough and almost furry before they ever hit the oven. That textured exterior is what grabs the hot fat and crisps up so dramatically during roasting. Duck fat, goose fat, or beef tallow each bring a deep, savory richness, though good olive oil works beautifully if that's what you have on hand. Optional crushed garlic cloves and fresh rosemary or thyme nestle alongside the potatoes as they roast, perfuming the whole tray without overpowering the golden, crackling crust. Every ingredient here is straightforward and naturally free from tree nuts, so there's no label-scanning or substitution stress — just honest, unfussy cooking. These are the kind of potatoes people hover around before they even make it to the table.
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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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