Pan-fried gnocchi with sage and hazelnuts

The resting on the cloth, uncovered, for those fifteen minutes — that's not fussiness either. A skin forms on the surface of the gnocchi as it dries slightly in the air, and that skin is what keeps the dumpling from dissolving into the cooking water and what lets it hold a crisp edge later in the pan. Skip it and you boil cloudy water and soft-edged gnocchi that fall apart the moment hot oil touches them.

The float test replaces a timer entirely, and this is the one place where watching beats counting: the gnocchi sink because they're dense, and rise the second the inside has steamed through enough to lighten them. There's no clock reading that tells you that — a pot that's slightly too hot or gnocchi slightly too large change the number every time, but the float is always true.

Hazelnut and brown butter is a pairing built on chemistry, not whimsy — both get their flavour from the same Maillard reaction, sugars and proteins browning under dry heat, so toasting the nuts and browning the butter separately and then combining them doubles down on one flavour rather than mixing two unrelated ones. Browning butter means cooking off its water content until the milk solids left behind toast to a nutty brown — watch for the foam subsiding and a smell like baked biscuit, not a clock figure, because every pan and every stove gets there at a different speed and burnt butter smells bitter and acrid, unmistakably wrong, so pull it a shade early rather than late. The sage leaves go in once the butter's already dark because their job is to crisp and release oil into the fat, not to simmer and turn bitter and limp.

On ingredients: use a potato that's floury rather than waxy — in Britain that's King Edward or Maris Piper, the same ones that go into a Sunday roast for the same reason, because they break down dry and fluffy rather than holding together wet and dense. A waxy potato like a new potato will fight you on every point above. Durum flour, rather than a standard plain flour, gives you a firmer, more toothsome bite and a pale gold colour, but if you only have plain flour in the cupboard, use it — you'll just want to be slightly more careful not to overwork it, since plain flour develops gluten more readily. The egg is there purely as a binder for a potato dough that otherwise has no structure of its own; there's no substitute that does the same job without changing the dumpling's character, so don't look for one here. For the oil you fry the gnocchi in, criterion is simple: anything with a high smoke point and no flavour of its own, so a neutral vegetable or sunflower oil works exactly as well as olive oil and won't fight the butter and sage. Hazelnuts can be swapped for any nut that browns and crisps rather than burns in a dry pan — walnuts or almonds, roughly — but skip pre-roasted or flavoured ones, since the point is toasting them yourself and controlling how far they go. Rocket adds the bitterness and pepperiness the butter and starch otherwise lack entirely; watercress does a similar job if that's what's in the fridge.

One more thing worth saying honestly: a domestic hob doesn't hold heat the way a professional stove does, so when you brown butter in a small saucepan, don't walk away — on a thin-bottomed pan the difference between "nutty" and "acrid" can be thirty seconds. And making the gnocchi itself, from boiling to shaping to resting, isn't a fifteen-minute job whatever packet-gnocchi might have taught you to expect. Patience here isn't virtue for its own sake — it's the only thing standing between a light dumpling and a dense one.