Step 1

Place the garlic, mint, turmeric, coriander, cumin, lemon zest, and 2 1/2 teaspoons salt in the bowl of a food processor fitted with the steel blade and process until finely ground. Add the olive oil and pulse to combine.

Step 2

Place the chops in one or two non-metal dishes large enough to hold them in one layer. Spread the garlic and herb mixture evenly on both sides. In a small bowl, whisk together the yogurt, Sriracha, and lemon juice, and spread it evenly on the lamb chops. Cover, refrigerate, and allow to marinate for 6 to 24 hours.

Step 3

Prepare a charcoal grill with hot coals and oil the cooking grate. Sprinkle the lamb with salt and grill 5 to 6 inches above the coals, first with the yogurt side up (marinade and all) for 4 to 5 minutes, then turn and grill for 3 to 4 minutes, until medium rare. Transfer to a clean plate, cover the plate tightly with aluminum foil, and allow to rest for 10 minutes. Sprinkle with salt and serve hot with the couscous.

Step 4

Heat the oil and butter in a large saucepan over medium heat. Add the onion and cook over medium-low heat for 6 to 8 minutes, stirring occasionally, until tender but not browned. Add the stock and bring to a boil. Stir in the couscous, 1 teaspoon salt, and 1/2 teaspoon pepper and remove from the heat. Cover the pot tightly and allow the couscous to steam for 10 minutes. Fluff the couscous with a fork and stir in the mint and pine nuts. Taste for seasonings and add about 1 teaspoon salt, depending on the saltiness of the stock, and 1/2 teaspoon pepper. Serve hot.