January rain on the kitchen window, the heating on, and the smell of smoked haddock poaching in milk. There are evenings when you know what you want before you've even opened the fridge. This is one of them.

I buy undyed haddock from the fishmonger on Saturday mornings. The real thing, pale and pearlescent, none of that lurid yellow nonsense. It smells of the sea and the smokehouse, quietly, not shouting. The milk it poaches in turns golden and takes on the smoke, and that milk goes into the mash, which means the whole plate speaks the same language. Leeks, cooked slowly in butter until they've given up every trace of resistance, finished with cream. Mash that's loose and generous. The fish laid on top, barely held together, flaking at the touch of a fork. Right food, right evening.

This is a plate I come back to every winter. I wrote it down in the notebook years ago, just three words: haddock, leeks, Tuesday. That was enough. The dish hasn't changed because it doesn't need to. It takes less than an hour, most of it gentle simmering, and it asks very little of you except attention. Feed it to someone on a cold night and watch their shoulders drop. There are few better feelings than putting a warm plate in front of someone when the weather is against them.