This is from Every Day w/ Rachael Ray. It's inexpensive, easy and tastes great. I'm not a fan of bell peppers, so I used a bit of petite diced tomatoes for color and flavor.
In a small bowl, combine the yogurt and 2 garlic cloves and season with salt and pepper.
In a large skillet, heat the olive oil over medium heat. Add the bell pepper and onion and cook, stirring occasionally, until softened, about 5 minutes.
Stir in the remaining garlic, the chile and cumin and cook for 30 seconds.
Add the beef and cook, breaking up with a spoon, until no longer pink, about 5 minutes and season with salt and pepper.
Place pitas on a baking sheet and bake for apx 5 minutes until a little brown.
Top with ground beef mixture and serve with garlic yogurt.