Is the pita necessary? I have all the ingredients at home except that and was thinking of just making the meat and having it with a little rice
I don't see why not - I think the pita would have been good for some texture (crispy together with the soft meat texture), but I can't see why you can't make the chicken without :)
The pita is not absolutely necessary, though the pita on the bottom does become an incredibly delicious, stuffing-like mixture that I personally think is essential. However, if omitting pita be sure to cover the chicken while baking so it won't dry out and/or burn. Hope you enjoy!