Spinach Manicotti

Ingredients

• 8 uncooked manicotti shells
• 1 1/2 cups part-skim ricotta cheese
• 1 cup (4 ounces) shredded part-skim mozzarella cheese
• 1/3 cup grated Parmesan cheese
• 1 tablespoon chopped fresh parsley
• 1/4 teaspoon pepper
• 1 (10-ounce) package frozen chopped spinach, thawed and drained
• 1 large egg, lightly beaten
• 1 large egg white
• Olive oil-flavored cooking spray
• 2 1/2 cups marinara sauce