Pitas are great travelers as the bread encloses its filling safely and neatly. They can be warmed or toasted, split open, and stuffed with many different fillings and vegetables for a complete meal. These pizza-flavored pitas are delicious even when cold.   The vegetable and cheese mixture can be prepared well in advance. If you double the recipe, the ready pizza pitas can be frozen and rewarmed for a quick breakfast or lunch!   For the Adults: Load these up with more veggies!