5 issues of BBC Good Food for £5
Heat the oil in a large saucepan and fry the bacon for 2 mins. Add the chicken, then cook with the bacon for a further 2-3 mins, until the pieces begin to turn golden. Tip in the leeks and cook gently for 10 mins until wilted and tender.
Stir through the flour and gradually add the stock, stirring constantly. Add the wholegrain mustard and crème fraîche, stir again, then simmer gently for 5 mins until the sauce is slightly thickened and creamy. Serve on top of baked jacket potatoes.