Season the lamb chops with salt and pepper and set aside while you prepare the marinade. In a small mixing bowl, stir together the harissa, garlic, and herbs. Rub paste over lamb chops to coat. Cover and marinate in the refrigerator for 4 hours or as long as overnight.
Remove the lamb chops from the refrigerator and let sit at room temperature for 30 minutes to take the chill off the meat. Preheat grill to medium-high heat; brush and oil the grates before you start cooking. If possible, keep a cool zone to move the chops to in case of flare-ups. Place the lamb chops on the grill and cook 8 to 12 minutes total for mod-rare (125ᵒF to 130ᵒF), turning every few minutes. Remove and let rest for 10 minutes before serving. Serve hot with Tzatziki Sauce.
Recipe by Grilling Outdoor Recipes powered by Bull Outdoor Products at https://blog.bullbbq.com/harissa-lamb-chops-with-tzatziki/