Step 1

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.

Step 2

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.