Frango Piri-Piri (Whole Chicken Split Flat over Charcoal)

Variations

• Turning the heat up or down: chilli and heat records that the heat sits in the white pith rather than the seeds. Scrape the pith and you keep the colour and the chilli smell while the burn drops. To go the other way, leave the pith in rather than adding more chillies.
• In the oven: a rack in the hottest part of a 230°C oven, 40-45 minutes. It works, and it gives up one of this dish's controls — an oven has no hot zone and cool zone.
• Sauce at the table: use half of it on the grill and put the rest in a dish. Portuguese grill houses commonly do exactly that.
• Smaller birds: quail and poussin are split the same way and cook far faster. The gain from splitting shrinks as the bird does, because the difference in thickness was small to begin with.
• The name: frango is chicken and piri-piri is a variety of chilli, so the name of the dish means piri-piri chicken and nothing beyond that.

Tips

• The real problem here is that one chicken has two centres. Cooking meat supplies the numbers — "Chicken breast wants 74°C; chicken thigh is actually better near 80°C, where its connective tissue softens." Six degrees apart, and they point in opposite directions: breast goes dry above its figure, thigh only becomes tender at its own.
• And the same guide writes down the limit of its own list. "That list assumes one centre, though. Some dishes have two, and then a thermometer does not settle it." The example it reaches for is Scotch egg, whose two centres sit a centimetre apart and which solves them in time — boil the egg first, chill it, and only then fry. A chicken cannot do that. Its two centres are a hand's width apart and joined in one piece, so there is no taking one of them out early and reuniting them later.
• The neighbouring pages both answer by giving up on cooking it whole. Southern fried chicken applies those same two numbers to separate pieces — "Breast comes out at 74°C, legs and thighs at 80°C." Jointed, each one simply comes out when it is ready. Galantine goes further and bones the bird out completely, rebuilding it as a single thickness. Dak-hanmari sidesteps the question by cooking in water, where every part of the medium is the same temperature and thickness has no vote.
• Splitting the bird is the answer that keeps the bird whole, and it works in geometry rather than in time. Take the backbone out, crack the breastbone, and the chicken becomes a single sheet. There are still two centres, but they are now two places on one plane — and things in different places can be given different distances from the fire.
• Which is what makes the two-zone rule usable within one bird. Grilling sorts food by thickness — "Thin food (under 1.5cm) — starts and finishes on the hot side." and "Thick food — comes up to near its target on the cool side, then takes its colour on the hot side at the end." That list assumes a piece has one thickness. A whole chicken has both at once, and only once it is flat can you put the thighs over the hot side and the breast over the cool one and run both lines of the list on the same bird.
• The sauce goes on at the end because of the oil, not the sugar. This is a different reason from the guide's rule about sugary marinades. Half of this sauce is olive oil, and oil that drips is flame — "Those flames deposit soot — carbon from incomplete combustion — onto the surface of the meat." The remedy is in the same place: not a squirt of water but a move to the cool zone.
• That oil is not a preference; it is how the heat travels. Chilli and heat gives the reason — "Capsaicin dissolves in fat, not in water." Piri-piri blended with vinegar and water alone does not spread evenly over skin; it sits in patches and arrives all in one mouthful. An oil base is what lets a brush distribute it.
• Salt early, acid late. Salt wants the night before, so that it reaches past the surface and the skin dries out. Lemon and vinegar will not tenderise the meat — what marinades do is direct about it: "Vinegar, lemon and wine denature surface proteins, which can read as tender, but they do not reach the interior". They also push moisture to the surface, which works against the browning of the skin. Acid's place in this dish is on top of a skin that is already crisp.