This is something that I have made for quite a few people. It has always been loved, so here's how to do it.
Whole Wheat Pita
Olive Oil
Tomato
Feta Cheese
Spinich
Black Olives
Spread some olive oil on the pita then cover in fresh spinich leaves. Add the tomato (cut in slices or diced), olives, and feta. Place in a 450 degree oven (I use my toaster oven). Leave it in until it starts to brown. It all depends if you want the pita crunchy or more chewy. Enjoy! Let me know if you try it =)