Preheat the oven to 200C/180C fan/gas 6.
Find a large roasting tin that will hold the chicken thighs and potatoes in a single layer. Mix the chilli with the tomato purée, olive oil and garlic, then spread over the chicken.
Add the chicken, potatoes and onion to the tin, then mix everything together well and roast for 20 minutes.
Stir in the lardons, tomatoes, courgette and pepper, and roast for 30 mins more. until the tomatoes have softened and the chicken is cooked.
Serve straight from the roasting tin with a seasonal salad.
