Warm pitas in the preheated oven or in a microwave for 1 minute, or until soft. Spread lightly with tomato sauce, pressing to flatten while spreading. Sprinkle with black olives, pimento peppers, tomatoes, mozzarella cheese, blue cheese, basil, oregano and coriander.
Spread the pitas on a large baking sheet and place in the preheated oven 8 minutes, or until the pita bread has reached desired crispness. Serve whole, or cut into slices.