Gai Yang (ไก่ย่าง) — Isaan Charcoal-Grilled Chicken with Jaew

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// OPERATIONS

1. 1 Set the chicken breast-side down on a board and cut down each side of the backbone with heavy kitchen shears, removing it in one piece (keep it for stock). Turn the bird over, put both palms on the breastbone and press down hard until you feel the keel crack and the bird lies genuinely flat — a half-flattened bird sits proud in the middle, and the breast will be dry long before the thigh joint is cooked. Slash each thigh and drumstick twice, straight down to the bone, so the dark meat cooks at the same rate as the breast and the marinade reaches the middle of the muscle, then pat the skin dry with kitchen paper.
2. 2 In a granite mortar, pound the white peppercorns to a fine powder, then add the lemongrass and the salt and work for 2-3 minutes until the fibres break down, then the coriander roots, then finally the garlic, pounding 8-10 minutes in total until you have a smooth, fibre-free khaki paste that clings to the pestle rather than sliding off it. Coriander root, not leaf, is the backbone of this marinade: it is earthy and slightly bitter and it survives fire, where leaf tastes thin and green and vanishes. A small food processor will get you there in 60 seconds if you have no mortar and that is what plenty of Thai home cooks now use, but it shears rather than crushes, so the paste comes out wetter and less aromatic — pulse it dry first, and only then add the liquids.
3. 3 Warm the 60 ml fish sauce for the marinade in a small pan over low heat until it is just hot to the finger, no more, then mash the 30 g palm sugar into it with a fork until not a grain is left; palm sugar will not dissolve in cold liquid, and any lump that survives sits on the skin during grilling and scorches to black before the rest of the bird colours. Scrape the pounded paste into a bowl, stir in the sweetened fish sauce and the oyster sauce, then stir in 100 ml of the coconut milk. The oyster sauce is a market-stall addition rather than a village one, but every Isaan vendor I have stood next to uses it: it deepens the colour and helps the skin lacquer, and I would not leave it out. Set aside 2 tbsp of this marinade in a jar with the remaining 60 ml coconut milk, cover and refrigerate — that is your basting liquid, and taking it now means it never touches raw chicken.
4. 4 Rub the rest of the marinade all over the bird, pushing it under the skin of the breast and thighs with your fingers and packing it into the slashes, then lay the chicken in a large dish or a zip bag, cover, and refrigerate for 12-24 hours, turning it once. Under 12 hours the salt has not carried the paste past the surface and the meat next to the bone tastes plain; over 24 and the fish sauce starts to cure the flesh to a firm, hammy texture. At the same time, rinse the 400 g sticky rice in several changes of water until it runs nearly clear and leave it to soak in plenty of cold water, at least 4 hours or overnight — this is the one thing in the meal that genuinely cannot be shortcut, as unsoaked sticky rice steams to a chalky core no matter how long you cook it.
5. 5 Make the khao khua: toast the 25 g raw sticky rice in a dry 20 cm heavy skillet over medium-low heat, no oil, shaking and stirring almost constantly for 10-12 minutes until every grain is the colour of strong tea and the pan smells like popcorn. Pale rice contributes nothing but grit, and rice taken past dark brown turns bitter. Tip it onto a cold plate and let it cool completely before grinding it in the mortar or a spice grinder to the texture of coarse sand — ground while warm it goes gummy and pastes together. You will have about 5-6 tbsp; the jaew needs 3 tbsp in total and the rest keeps in a sealed jar for a month.
6. 6 In the same dry pan over medium-low heat, toast the dried chillies for 2-3 minutes, pressing and turning them, until they darken half a shade and smell smoky rather than acrid; open a window first, because the fumes are genuinely sharp. Cool, then pound or grind to coarse flakes — you will have more than you need, and they keep. Dissolve the 15 g palm sugar in 2 tbsp hot water in a bowl, then stir in the 60 ml fish sauce, the lime juice, the tamarind and 1-2 tbsp of the chilli flakes to taste, and leave the base to stand while the chicken cooks. Jaew should taste sharply salty and sour first, hot second and barely sweet at all — tasted on a spoon it will feel slightly too aggressive, which is correct, because it is a dip for fatty chicken. If you keep pla ra, add 1 tbsp of its strained broth and cut the fish sauce back by the same amount; that is the Isaan version.
7. 7 Take the chicken out of the fridge 45 minutes before it goes on, and wipe off the excess marinade so only a thin film remains — clinging paste burns to soot. Light about 1 kg of lump charcoal (roughly half a chimney), and when it is fully ashed over, bank it hard against one side of a 57 cm kettle grill, leaving the other half completely empty. Fit the grate, close the lid with the top vent wide open and positioned over the empty side, and let the grill settle at 160-170°C / 320-338°F. Resist the urge to build a bigger fire: this marinade is loaded with sugar, coconut and fish sauce, and over direct flame you will have a black bird that is raw at the thigh joint in fifteen minutes. Without charcoal, a 180°C / 350°F fan oven (200°C / 400°F conventional) for 50-60 minutes followed by 6-8 minutes under a fierce grill will give you a good bird — do not push the oven hotter, because the sugar in the paste scorches long before the thigh is done — but be honest that it is roast chicken with a Thai marinade; here the smoke is an ingredient, not a garnish.
8. 8 Lay the bird skin-side up on the empty side of the grill, legs and thighs pointing toward the coals and the breast furthest from them, close the lid and cook for 50-70 minutes, brushing with the reserved marinade-and-coconut-milk mixture every 20 minutes. At the 40-minute mark add 8-10 fresh coals, tucking them against the edge of the burning pile rather than dropping them on top, so they catch cleanly — unlit lump smouldering under a closed lid gives off a sooty, acrid smoke that settles straight onto wet skin. The vendors' bamboo clamps exist so the whole flattened bird can be turned and stood on edge as one piece; two long metal skewers pushed through crossways, or a cheap hinged fish basket, do exactly the same job. Cook until the thickest part of the thigh reads 72°C / 162°F on an instant-read thermometer pushed in without touching bone, and give it a last baste there.
9. 9 While the chicken is on the grill — start this about 40 minutes before you want to eat — drain the soaked rice, spread it in a muslin-lined steamer or a bamboo huat set over a pan of hard-boiling water, cover, and steam for 20-25 minutes, flipping the whole mass over in one piece at the halfway point so the top layer meets the steam. It is done when the grains are translucent, glossy and chewy-tender with no white chalk in the centre. Turn it out, fluff briefly to release steam, and keep it in a lidded basket or a covered bowl at room temperature; sticky rice steamed hours ahead dries to pellets, and refrigerating it turns it hard and unpleasant, so time it to the chicken rather than the other way round. Now finish the jaew: stir the shallot, spring onion, coriander and 2 tbsp of the toasted rice powder into the base and leave it 10 minutes — the aromatics go limp and the rice powder swells to a paste if they sit in the dressing for hours.
10. 10 Now build the skin: slide the bird skin-side down directly over the coals for 3-6 minutes, then flip it back for 2-3 more, moving and repositioning it constantly, until the skin is deep mahogany, blistered and freckled with genuine char at the edges. Do not baste over direct heat and do not walk away for even thirty seconds — the palm sugar goes from lacquered to acrid faster than anything else on the grill. Pull the bird when the thigh reads 78-80°C / 172-176°F and the juices at the thigh joint run clear with no pink; dark meat needs that extra few degrees for the connective tissue to render and the meat to pull cleanly off the bone, while the breast should be no hotter than 72°C / 162°F, so move the bird further from the coals if the breast is racing ahead.
11. 11 Rest the chicken skin-side up on a board for 10-15 minutes, completely uncovered — foil traps steam and turns the skin you just spent an hour building into wet paper. Then chop straight through the bone with a heavy cleaver, Thai-style, into 10-12 pieces: drumsticks, thighs, wings, and each breast half cut across into three or four.
12. 12 Pile the chicken on a platter with the cut edges showing, stir the last 1 tbsp of toasted rice powder into the jaew at the table so it is gritty rather than pasty, and serve with the sticky rice in its basket, the jaew in small individual bowls, and a plate of raw white cabbage wedges, cucumber and yard-long beans. Som tam alongside makes it the full Isaan meal. Eat with your hands: pinch off a walnut of sticky rice, press it flat, use it to pick up the chicken, and drag both through the dip.

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