Extreme Pita is a great place to stop for a quick lunch in the Ballantyne area. It's in the Ballantyne Village which is a little tricky to get into and out of, but if you go early you can miss the crowds. Once it gets busy, that place gets hectic!
The set up here is similar to Subway in that you can essentially build your own pita by picking any toppings and sauces you want and watching the folks behind the glass put it together for you. There is a huge sign on the back wall that you cannot miss that gives you the nutrition info on all of their pitas as well, so you can have an idea of exactly what you're about to scarf down. If you're a Ballantyne Corporate Card holder, you can add a drink and chips for free. That's a pretty sweet perk.
I've eaten here many a time and have always enjoyed it. The Thai chicken is my favorite, and the Chicken Souvlaki is also really good. Even though it's technically fast food (I guess?) you don't come away feeling like you just ate half a cow. Highly recommend this place if you want a quick, healthy lunch!