Add the reserved liquid from cooking the leeks. Add the turkey, ham, stuffing and leeks to the béchamel and stir very gently – be careful as you don’t want the meat or leeks to break up.

Meanwhile, for the sage and onion stuffing, increase the oven temperature to 180C/350F/Gas 5. Heat the oil in a frying pan over a medium heat. Add the onion and garlic and fry for 4-5 minutes ...