Spinach and Feta Pita Bake

INGREDIENTS

• 6 (6 inch) whole wheat pita breads
• 1 (6 ounce) tub sun-dried tomato pesto
• 2 roma (plum) tomatoes, chopped
• 1 bunch spinach, rinsed and chopped
• 4 fresh mushrooms, sliced
• 1/2 cup crumbled feta cheese
• 2 tablespoons grated Parmesan cheese
• 3 tablespoons olive oil
• 1 pinch ground black pepper to taste