Mexican Lasagne

Start with the dry spices in a bare pan, no oil. Cumin, chilli flakes, ground coriander — these are seeds and barks, not leaves, and they carry their flavour in oils that are locked up tight until heat cracks them open. You're not cooking them, you're waking them. The cue is smell, not a clock: when the kitchen suddenly smells like a spice shop rather than a spice jar, stop — another thirty seconds and that same heat turns fragrance into bitterness, because the sugars in the spice start to scorch before the oil fully opens. A domestic hob runs hotter in the centre of the pan than at the edges, so keep the pan moving.

Paprika and smoked paprika go in after you lower the heat, with the onion and oil — because paprika burns fast and turns acrid, while cumin needs the dry heat to open up. This is also where the onion decides the dish's backbone: fry it till it goes soft and translucent, not browned — you want sweetness, not caramelisation, because caramelised onion would fight the smoky paprika instead of carrying it.

The sun-dried tomatoes go in with the raw mince, and this is deliberate — their concentrated sweetness and acidity season the meat from inside as it browns, rather than sitting as a garnish on top later. Brown the mince properly, on real heat, enough that it's taken on colour and lost its grey. Some say browning mince is pointless, it all ends up stewed anyway — no, because that colour is flavour: sugars and proteins reacting on contact with a hot pan, something that simply cannot happen once the mince is drowned in tomato and stock. Skip it and the sauce tastes flat no matter how long you simmer it.

Then the lid goes on and everything slows down. Thirty minutes isn't a rule, it's a lower bound — what you're actually waiting for is the celery losing its raw crunch and the courgette dissolving almost entirely into the sauce, thickening it by releasing its water and starch rather than you reducing it dry over high heat. A pan lid at home rarely seals as well as a kazan's — expect a bit more evaporation, and top up with a splash of stock if it looks like it's catching.

Beans, jalapeño and half the sweetcorn go in at the end, off a long simmer, because beans only need warming through — further cooking just breaks their skins and turns them mealy. For the beef, any coarsely ground meat with reasonable fat works — lamb mince, or a plant-based mince if you're veering that way, the method doesn't change. For the lasagne sheets, any flat pasta that can sit in liquid and soften without you pre-boiling it will do; dried "no-boil" sheets are built for exactly this job, so don't bother cooking them first — that's one more pot to wash for no gain. The cheddar wants to be a cheese that melts and browns rather than one that just goes stringy — a strong cheddar gives you both the savoury hit and a crust; a milder cheese will melt fine but leave the top pale and a bit dull. Bake until you can see the top properly blistered and the edges bubbling, not just until the timer says so — ovens lie, your eyes don't.