I have made this same recipe and put it in filo as a pastie type of thing that we took to a family lunch and no one had a clue that it was diet food. I just wrapped them in little squares with each corner meeting in the middle of the top.
Hope that made sense to you.
Another thing I often do with this recipe is add extra veg. and then I make a spare pie with just the vegetables and no chicken but the flavour is still there from the stock. My family love this recipe and it is a great one for taking to work or as my son will tell you it is great to eat cold.
If the second pie lasts long enough you can freeze it for another meal.