In a bowl, whisk together yogurt, olive oil, lemon juice, minced garlic, cumin, coriander, paprika, turmeric, salt, and black pepper until smooth and fully combined. The mixture should smell intensely fragrant — that's when you know the spice balance is right. Stir in half the fresh parsley and all the cilantro, saving the rest for garnish later.

Pat the chicken thighs dry with paper towels, because any surface moisture stops proper charring from happening. Place them in a large zip-top bag or shallow dish and pour the entire marinade over them, turning to coat completely. Refrigerate for at least 20 minutes (you can go up to 8 hours if you're prepping ahead for a gathering, which gives the spices even more time to penetrate the meat).

Preheat your grill to medium-high heat — about 400°F if you have a thermometer. Oil the grill grates with a towel dipped in high-heat oil, because the marinade contains yogurt and will stick otherwise. I learned this the hard way by losing an entire piece to the grates, so skip that lesson yourself.

Remove chicken from the marinade, letting excess drip off back into the bowl, then arrange thighs directly on the grill grates. Don't touch them for the first 6 minutes — this is where the crust develops and the spices actually caramelize against the heat. If you move them constantly, you're just steaming the chicken instead of grilling it.

Flip the thighs and grill for another 5-7 minutes on the second side until a meat thermometer reads 165°F in the thickest part without touching bone. The exterior should be deeply browned and slightly charred, which means the flavors have concentrated. This is the visual cue that separates undercooked shawarma from the real thing.

Transfer cooked chicken to a cutting board and let it rest for 5 minutes before slicing. The resting step isn't optional — it lets the juices redistribute so every bite stays moist instead of running all over the plate when your crowd digs in.

Slice the cooled chicken against the grain into thin strips, then toss gently with the reserved fresh parsley and a squeeze of fresh lemon juice if you want extra brightness. This final toss is where I add more lemon because the grill mellows the citrus, and crowds always react to that pop of flavor.