Chicken Ham and Leek Pie

Heat the chicken stock in a lidded saucepan. Add the chicken breast and bring to a low simmer. Cover with a lid and cook for 10 minutes. Remove the chicken breasts from the water with tongs and place on a plate. Pour the cooking liquor into a large jug.

Melt 25g/1oz of the butter in a large heavy-based saucepan over a low heat. Stir in the leeks and fry gently for two minutes, stirring occasionally until just softened. Add the garlic and cook for a further minute. Add the remaining butter and stir in the flour as soon as the butter has melted. Cook for 30 seconds, stirring constantly.