A dish built for dark evenings

There are few things more comforting than the smell of a lamb hotpot creeping through the house on a January afternoon. It is the sort of cooking that belongs to the British countryside: a handful of humble roots, a cheap cut of lamb, and a long stretch of time in a low oven. Nothing fancy, nothing rushed, and a result far greater than the sum of its parts.

Hotpot is a Lancashire dish at heart, though every county with sheep and a root clamp has its own version. The principle is always the same: layers of meat and vegetables under a lid of sliced potato, with just enough liquid to steam everything tender while the top crisps to a golden, buttery finish. Get it right and you have a meal that feeds four generously for very little money.

What goes into a proper hotpot

You do not need a long shopping list. The quality of a hotpot comes from patience rather than expensive ingredients, so buy the best lamb you can afford and keep the rest simple.

• 1kg lamb — shoulder, neck fillet or middle neck chops, cut into chunky pieces. Bone-in chops give the deepest flavour.
• 2 large onions, sliced fairly thickly.
• 3 carrots, sliced into coins about the thickness of a pound coin.
• Half a swede and 2 parsnips, cut into rough 2cm chunks.
• 1kg floury potatoes — King Edwards or Maris Pipers — peeled and cut into 3mm slices.
• 500ml lamb stock, made from a cube if you must, but better from roasted bones if you have them.
• A tablespoon of Worcestershire sauce, a teaspoon of dried thyme, two bay leaves.
• 50g butter, plus a little dripping or oil for browning.
• Salt and plenty of black pepper.

Choosing and preparing the lamb

Shoulder is the reliable choice. It carries enough fat and connective tissue to collapse into something spoon-tender after two hours, whereas leg will stay firm and slightly dry. If you are using neck fillet, cut it into pieces the size of a walnut so it cooks through in the same time as the vegetables.

Brown the meat first, and do it in batches. Crowding the pan steams the lamb rather than colouring it, and that brown crust is where a good part of the final flavour comes from. Use a heavy casserole or a deep ovenproof pot with a tight-fitting lid, get your fat properly hot, and give each piece a couple of minutes a side. Lift the meat out onto a plate and leave the fat behind in the pot.

Now soften the onions in that same fat for ten minutes until they are floppy and sweet, scraping up the browned bits as you go. Those stuck-on juices are worth more than any stock cube.

Layering the pot

Layering is the whole art of a hotpot, and the order matters more than you might think. Start with half the carrots, swede and parsnip in the base of the pot. They will sit in the liquid and turn meltingly soft.

Pile the browned lamb on top, then scatter over the onions, the thyme, the bay leaves and a good grind of pepper. Add the rest of the root vegetables, then pour in the stock and Worcestershire sauce. The liquid should come to about two-thirds of the way up the filling — you want steam, not soup. If you are short, top up with a little water.

Now the potato lid. Arrange the slices in overlapping circles, working from the outside in, so the surface looks like a tiled roof. Season each layer lightly as you build, and finish with a generous knob of butter dotted over the top. This crust is what makes a hotpot a hotpot rather than a stew.

The long bake

Cover the pot and put it in an oven at 150°C fan, 170°C conventional, Gas Mark 3 for two hours. Resist the urge to stir. Every time you lift the lid you lose the steam that is doing the cooking.

After two hours, take the lid off and turn the heat up to 200°C fan, 220°C conventional, Gas Mark 7. Give it another thirty to forty minutes, until the potatoes are deeply browned at the edges and a knife slides through the middle without resistance. If the top is catching before the middle is tender, cover it loosely with foil and carry on.

Let it stand for ten minutes before serving. It will be molten straight from the oven, and the rest also lets the juices thicken slightly.

Serving, and what to do with the leftovers

A hotpot needs nothing more than buttered bread and a sharp pickle — beetroot, red cabbage or a good chutney all cut through the richness. A plain green vegetable, or braised red cabbage if you have it, will do nicely on the side.

Any leftovers improve overnight. Cool the pot quickly, keep it covered in the fridge for up to three days, then reheat gently with a splash of stock to loosen the base. Cold hotpot, incidentally, is excellent fried in a little dripping until the potato edges go crisp, and served with a fried egg for a farmhouse breakfast that will see you through a morning of muck-spreading or fence-mending.