Pre-heat the oven to 180c. Wet the top of the pie and place, in their foil dishes, on a tray and cover with tin foil. Place in the oven for approximately 18 minutes then remove the foil and return to the oven for a further 3 to 5 minutes (depending on how well done you want them), or until piping hot.
Remove the pies from their foil dishes and heat upside down in the microwave for approximately 1½ minutes for one pie, 2 minutes for 2 pies, adding 30 seconds onto the timer for each additional pie. Then return the pies to their foil dishes and heat on a tray in a preheated oven set to 180c, for 5 minutes or until piping hot.