In a large bowl mix the spices, lemon juice and mint together, add the lamb, season and stir to coat. Cover and set aside in a cool place or in the fridge.
Preheat the oven to 220°C, 200°C Fan, Gas Mark
Put the onions, peppers, courgettes, cherry tomatoes, chickpeas and oil in a non-stick roasting tin, season and gently toss. Roast for 30-35 minutes, stirring occasionally. Alternatively, roast the vegetables in a large air-fryer, according to the manufacturer's instructions.
For the dressing, whisk all the ingredients together and set aside.
Preheat the grill to moderate. Thread the lamb cubes evenly onto the skewers and cook for 12-16 minutes, turning once, until the juices run clear. Set aside to rest for 1-2 minutes.
Prepare the couscous according to the packet instructions, drain and transfer to a large bowl. Add the roasted vegetables, the remaining herbs and pomegranate seeds. Stir together combine and transfer to a large serving plate.
Arrange the kebabs on top of the salad, add the dressing and serve.