Mix all the vegetables in a large bowl with the Walnuts, oregano, sumac, vinegar and oil, season well. Spread out onto the tray of an air fryer and air fry at 200oC for 20-25 minutes, stirring once half way until golden and softened. Remove and set aside.
Add the flatbreads to the air fryer tray and air fry at 160oC for 3 minutes to warm up.
Spread the flatbreads with the houmous and top with the vegetables, serve topped with a spoonful of yogurt.
