Pepper to taste; Preheat over to 450 degrees. Place four pits on a large baking sheet. Drizzle half ts olive oil over each pita, then cover with quarter can of the tuna in oil. Put mozzarella cheese of each bread. Put a tomato slice on each bread. Sprinkle half ts olive oil and 1 ts basil on each pita. Season with pepper to taste. Bake for about 10 minutes, until the cheese is bubbly. Let cool for several minutes and serve.