Heat 1 tablespoon oil in a deep frying pan or flameproof casserole with a lid. Add 8 chicken thighs and brown on all sides.
Reduce the heat and add the onion wedges. Cook for a few minutes until beginning to soften.
Add 500g potatoes to the pan, then stir in 250ml crème fraîche followed by 150ml stock, 1-2 tablespoons mustard and a few sprigs of frsh thyme if using.
Cover and cook for 40 minutes on a low heat until the potatoes are tender.
Mix 1 tablespoon cornflour with 1-2 tablspoons of cold water to form a smooth paste, then stir into the casserole. Cook stirring until the sauce thickens slightly. Serve with a scattering of fresh thyme leaves if desired.
Notes
StoreLeftovers can be kept for up to 48 hours in the refrigerator. reheat until piping hot.Can be frozen for up to 3 months.Cooks TipHowever, if you are planning to make and freeze ahead, I would omit the potatoes as I find they tend to loose thier texture and become a bit watery when frozen. Simply boil until tender alongside reheating and add to the pan for the last 5 minutes or so.Nutrition information is calculated usingan online nutrition database - is approximate and is meant as a guideline only. (It does not include seasoning.)