Season the lamb chops with salt and place in a shallow dish.
To make the chermoula, combine the cilantro, parsley, garlic, cumin, paprika, thyme, turmeric, lemon peel, oil, lemon juice, and pepper flakes in a food processor and process until smooth. Season to taste with salt and pepper.
Pour three-quarters of the chermoula over the lamb and rub in. Cover and let marinate for up to 10 hours in the refrigerator. Store the remaining chermoula in the refrigerator (bring to room temperature before serving).
To make the couscous, bring the water to a boil in a small saucepan. Add the couscous, dried mint, and salt. Cover and turn off the heat. Let steam for 8 minutes. Remove the lid and fluff the couscous with a fork. When slightly cooled, fold in the lemon zest and juice and the fresh mint, reserving some mint for garnish.
Heat a 12-inch cast-iron skillet over medium-high heat. Remove the chops from the marinade, wiping off any excess. Arrange half of the chops in the pan in a single layer, taking care not to crowd them. Cook until well browned on both sides, turning as needed, about 8 minutes total. Repeat with the other half of the chops.
Let the chops rest for 5 minutes before serving with the minted couscous and the remaining chermoula, garnished with the reserved fresh mint.
Cast-Iron Cooking, © by Rachael Narins, Photography by © Keller + Keller Photography, used with permission from Storey Publishing.