Low Calorie Spinach & Ricotta Stuffed Shells Recipe - (4.1/5)

Ingredients

• 18 jumbo pasta shells (about 6 ounces)
• 1 1/2 teaspoons olive oil
• 1 medium onion, finely chopped
• 1 15 oz can crushed tomatoes
• 3/4 teaspoon sugar
• 1/4 teaspoon salt plus
• 1/4 teaspoon freshly ground black pepper plus additional for seasoning
• 2 cups baby spinach, finely chopped
• 1 cup low-fat ricotta
• 1/2 cup shredded part-skim mozzarella
• 1 egg white, lightly beaten
• Olive oil cooking spray