In food processor, blitz the yoghurt, lime juice, honey, coriander, olive oil, chilli powder and salt until mostly smooth.
Slice a third of the cucumber into half moons and set aside. Deseed the remaining cucumber by slicing in half lengthways, then use a spoon to scoop out the seeds. Coarsely grate the cucumber then gently squeeze to remove any excess water. Stir through the blitzed sauce.
Slice the halloumi into 1/4 inch rounds. Heat 1 tsp oil in a non stick frying over a moderate heat. Fry the halloumi for 2-3 minutes on each side until golden brown and charred in places.
Transfer the halloumi to a plate. Warm the tortillas in the same pan for 30 seconds on each side.
Fill the tortillas with the halloumi, mango, red pepper, onion, cucumber moons and spoonfuls of the yoghurt dressing. Garnish with coriander and a squeeze of lime.