Chicken cordon bleu recipe | Good Food

Meanwhile, make the sauce. Melt the butter in a pan over a low heat. Stir in the flour and cook for a couple of minutes. Gradually pour in the milk, stirring continuously to prevent lumps. Turn the heat up to medium and cook, stirring occasionally until thickened. Remove from the heat and stir through the mustard, cheese and some seasoning. Serve the chicken with the sauce spooned over and a salad on the side, if you like.