In a bowl, mix the lamb mince with the moroccan spice mix, season with salt and shape into thick patties.
Grill the burgers on both sides till done.
To make harissa flavoured yoghurt sauce:
Mix all the ingredients till smooth and without lumps.
To assemble:
Lightly toast both sides of the bun, place shredded lettuce, red onion, add the burger patty and drizzle generously with the yoghurt sauce. Add 2-3 lemon soaked mint leaves to finish.