The roasting tin as a format has a reputation problem. It promises ease but often delivers flavour debt — pale vegetables steaming under protein, nothing caramelising, everything tasting of the same diluted pan juice. Iyer's version sidesteps this by treating the tin as a flavour layering device. The leeks and squash go in first, coated in a heaped tablespoon of the sesame-miso-ginger-garlic paste. The chicken thighs sit on top, slashed and lacquered with the rest. What the vegetables are doing is absorbing chicken fat and miso paste simultaneously for a full hour, which is a very different thing from steaming. The marinade is the structural decision here. Miso paste — red or white, Iyer says either works — is the kind of ingredient that does multiple things at once: umami depth, salt, a Maillard-reaction accelerant that turns chicken skin genuinely dark and sticky without a second glaze or a grill finish. Sesame oil, fresh ginger and four garlic cloves round it out. It's a short list. That's the whole point. The dressing, added in the last ten minutes, is what lifts this from a competent weeknight roast into something you'd actively want again. Soy, sesame oil, lime zest and juice, spring onions, red chilli, coriander. It's essentially a Southeast Asian vinaigrette, and it cuts through the fat of the chicken and the sweetness of roasted squash with real precision. The instruction to 'drizzle all over' undersells it — this dressing is the reason the dish tastes finished rather than merely cooked. The 'eat twice' section is where Iyer is doing something genuinely useful, not just padding a recipe. The leftover chicken and veg become a rice bowl with a peanut dressing — peanut butter loosened with lime, soy and a scrape of palm sugar — and freshly grated carrot and herbs. This is a different meal, not a reheat. The peanut sauce is bold enough that you want it over the shredded chicken, the miso-stained squash, the rice. The flavour logic is consistent across both meals: fat, acid, umami, heat. A note on the practical engineering: Iyer's instruction to slash the chicken thighs before applying the marinade is load-bearing. Without it, the paste sits on the surface. With it, the miso gets into the meat itself, and the skin has points of structural weakness where it will blister rather than remain uniformly pale. Small detail, real difference. Similarly, the rice bowl instruction to reheat leftover chicken with a tablespoon of water in a covered bowl for 40 seconds keeps the meat moist in a way that a dry microwave blast wouldn't. This is seasonal cooking done with actual thought. Butternut squash and leeks are the supporting cast, not afterthoughts, and they earn their place in the bowl the next day as much as they do the night before. The format — one tin, one marinade, two meals — is the kind of system thinking that recipe writing rarely commits to but home cooking actually needs.
