If you have a batch of Bechamel {White} Sauce stashed in the freezer, these pies will come together quite quickly. I have made small individual pies, however there is no reason you could not just make one pie. I would use a 20cm pie plate to make a large pie. I used a large piece of ham leftover from Christmas for these pies, however if sliced ham is all you can find use that instead. To make these vegetarian, just omit the ham and increase the amount of mushrooms. Assuming you do not have a pie maker, use six individual 10cm pie dishes. I have given instructions for baking these pies, however just follow the manufacturer's instructions if you have a pie maker.