Pre-heat the oven to 200 C/400 F.: The moment you open the oven after preheating you should feel a steady warm breath, and setting the correct oven temperature ensures the chicken skin crisps while the interior cooks gently. A properly preheated oven gives an even rise in heat, preventing undercooked pockets and ensuring the top of the casserole browns attractively. If you skip preheating, the chicken will spend too long warming up and can dry out, so always wait until the oven reaches the full temperature before placing the dish inside. Use an oven thermometer if your oven runs hot or cool, because small temperature differences change cooking times and texture.
Soak the rice for about 15 minutes then rinse under colder water until it runs clear.: Start by feeling the grains between your fingers after soaking, they should plump slightly and be less chalky; rinsing removes excess starch so the grains cook separate rather than gummy. This simple step affects the final mouthfeel significantly, producing light, distinct grains that soak up the spiced stock without collapsing. Avoid skipping the rinse, because too much surface starch causes clumping and a gluey texture. If your water remains cloudy after several rinses, continue until it clears for the best result.
While the rice is soaking, heat the olive oil in a heavy-based lidded casserole (30 cm works well here) and fry the onion until it starts to brown about 5 minutes. Add the garlic and spices and cook for about a minute until fragrant.: You will hear a gentle sizzle as the onion softens and begins to caramelize, releasing sweet, savory aromas that form the flavor base; when the garlic and spices hit the pan a heady perfume will rise, signaling it is time to move to the next stage. Browning the onion develops a complex savory note that simple sweating will not achieve, and the brief cooking of spices blooms their essential oils into the oil so they distribute evenly. Avoid letting the garlic burn, because that bitter char will carry through the whole dish; keep the heat at medium and stir frequently during this phase to maintain even color.
Add the aubergine, rice, lemon zest & juice, raisins, green olives, and stock and stir until incorporated. Scrape the bottom of the pan to get any sticky bits off. Place the chicken pieces skin side up on the rice. Brush with the olive oil and sprinkle generously with salt and pepper.: When you add the aubergine and other components, the pan will make a satisfying whispering sound as the liquid and oil meet, and the colors will shift to a richer, deeper palette; stirring ensures the rice sits evenly in the liquid so it cooks uniformly. The acidity from the lemon brightens the heavy notes, and the raisins begin to plump as they absorb the stock, which balances savory flavors. Make sure to scrape the bottom of the pan to release any fond, because those browned bits are concentrated flavor; if you neglect this, you lose a key source of depth. Watch the liquid level and distribution so pockets of dry rice do not form during cooking.
Cook uncovered for 40–45 minutes and until the chicken is golden brown and cooked through. Cook a little longer if you are unsure. Scatter the pistachios and pomegranate seeds over to serve.: The visual cue you want here is skin that looks glossy from the oil and seasoned with visible flecks of salt and pepper, which sets the stage for crisping and flavor penetration during roasting. Positioning the chicken skin side up allows direct dry heat contact from the oven, encouraging caramelization, while cooking atop the rice lets the juices mingle with the grains. Seasoning the exterior before roasting is important because it builds an immediate savory layer; under seasoning here is a common misstep, so be generous but balanced. Ensure the pieces are not crowded, or they will steam rather than brown, preventing the desirable golden crust.
Cook uncovered for 40 to 45 minutes and until the chicken is golden brown and cooked through.: During this roast you will notice a deepening aroma of spice, and the skin should become a rich golden brown, producing a faint sizzling sound as fats render and crisp. The rice should absorb most of the stock and swell, with the aubergine turning tender and creamy; check the chicken near the bone to confirm it is fully cooked, and extend the time a little if necessary. This uncovered phase is essential for texture contrast, letting moisture evaporate and promote browning, whereas covering would trap steam and sog the skin. A common error is rushing the internal temperature check, so probe in the thickest part near the bone and look for clear juices and a temperature that feels right to your touch.
Cook a little longer if you are unsure. Scatter the pistachios and pomegranate seeds over to serve.: After the main cook, you should hear only a soft hiss from the pan as residual moisture evaporates; adding chopped pistachios and bright pomegranate seeds at the end supplies crunchy and juicy contrasts that make every bite lively and balanced. These final additions do not need heat, and adding them too early will dull their texture and color. If the chicken seems slightly under, give it a few more minutes, because ensuring safe internal doneness is worth the extra oven time; just watch the skin as you extend cooking to avoid over browning. Present the dish immediately after garnishing so the nuts retain crunch and the seeds keep their brightness.