Preheat your oven to 200C (400F). Place onion, carrots and chicken in a roasting tray. Drizzle with a little olive oil.

Roast for 30-40 minutes, stirring about half way through.

Meanwhile, combine harissa, vinegar and 2 tablespoons extra virgin olive oil. Taste and season.

When the carrots, onion and chicken are cooked remove from the oven and drizzle over the dressing. Serve with carrot tops sprinkled over.