Quick chicken burger with sweet potato wedges

Method

1. Preheat the oven to 200°C/fan180°C/gas 6.
2. Tumble the sweet potatoes into a roasting tin, and toss with the olive oil and spice mix. Roast for 25 minutes or until crisp and tender.
3. In a small bowl, pour boiling water over the onion and soften for 15 minutes before draining and rinsing in cold water.
4. Meanwhile, preheat a griddle pan over a medium-high heat (or light/preheat a barbecue). Lay the chicken breasts between sheets of cling film then flatten with a rolling pin. Season and brush with olive oil. Griddle or barbecue for 3 minutes each side until cooked through.
5. Split the ciabatta rolls, brush the cut side with olive oil and griddle or toast until golden brown. Sandwich the chicken, onion and a handful salad leaves between the buns. Drizzle with sweet chilli sauce and serve with the sweet potato wedges.