Preheat oven to 375°F / 180° C
Sprinkle chicken pieces, potatoes and onions with salt and pepper.
Place in a deep ovenproof baking dish or heavy based pan such as cast iron.
In a small bowl combine mustard, honey, oil, dried mixed herbs chilli powder / chilli flakes to form a paste. Spread over chicken pieces,potatoes and onion, covering them completely.
Bake covered with foil for about 25 minutes.
Remove foil and bake uncovered for a further 10 - 15, stirring potatoes once
Roast until the chicken and potatoes are cooked
Remove from oven and serve warm with a salad and crusty bread if preferred.