Pre-heat the oven to 350F. Take a whole wheat pita (I cut it in half the long way to make it thinner), cover with whatever type of tomato sauce you like (I like tomato basil), veggies* such as peppers, broccoli, spinach, tomatoes, corn, etc., a little protein such as canned tuna or cooked chicken (don't forget: one serving of protein such as chicken or fish is the size of a deck of cards), and cover with thin slices of fresh mozzarella. Finally, sprinkle with basil (dried or fresh), black pepper and my favorite: sea salt. Place in oven until cheese is melted. Note: the pita might not become crispy if there is too much sauce and liquid on the pizza.
*I don't always have fresh veggies around, especially not a variety, so I keep bags of frozen veggies in my freezer for those days when I don't have time to run to the grocery store or want a quick, healthy meal. Before adding frozen veggies as toppings, defrost in the microwave; this way all parts of the pizza will be done cooking at the same time.