Greek Pita Veggie Pizzas

Ingredients

• 6 whole wheat pita breads (6 inches)
• 1-1/2 cups meatless spaghetti sauce
• 1 can (14 ounces) water-packed artichoke hearts, rinsed, drained and quartered
• 2 cups fresh baby spinach, chopped
• 1-1/2 cups sliced fresh mushrooms
• 1/2 cup crumbled feta cheese
• 1 small green pepper, thinly sliced
• 1/4 cup thinly sliced red onion
• 1/4 cup sliced ripe olives
• 3 tablespoons grated Parmesan cheese
• 1/4 teaspoon pepper