Pick the mint leaves, discarding the stems. Reserve half the leaves for serving, then finely chop the remainder. Thinly slice the spring onion. Finely chop the tomatoes and cucumber. Coarsely chop the olives. Crush or finely chop the garlic. Coarsely grate the onion and squeeze out the excess liquid.
Step 2 — Make meatballs
Put the lamb mince, garlic, onion, kofta seasoning and 1 tsp sumac in a large bowl and season with salt and pepper. Using damp hands, combine well, then shape into 10 walnut-sized balls.
Step 3 — Cook meatballs
Heat 1 tsp olive oil in a medium frypan over medium heat. Cook the meatballs, turning regularly, for 8-10 mins until browned and cooked through.
Step 4 — Soak couscous
While the meatballs are cooking, put the couscous in a large heatproof bowl, pour over 200ml boiling water and cover with a plate. Stand for 5 mins or until the water is absorbed. Season with salt and pepper, then fluff the couscous with a fork.
Step 5 — Make dressing
Meanwhile, put ½ tsp sumac*, 1½ tbs extra virgin olive oil and 2 tsp red wine vinegar in a large bowl and season with salt and pepper. Whisk well to combine.
Step 6 — Finish couscous and serve
Add the couscous, tomato, cucumber, olives, spring onion and chopped mint to the dressing and toss to combine. Taste, then season with salt and pepper. Divide the couscous salad and meatballs among bowls. Scatter with the mint leaves to serve.