For Greasing Pan:

• extra virgin olive oil or cooking spray

For Pan:

• 1/2 cup spaghetti sauce

For Pasta:

• 6 ounces jumbo pasta shells (about half a standard-size box)

For Filling:

• 15 ounces ricotta cheese
• 1 large egg
• 1 teaspoon garlic, minced
• 1/4 cup parmesan cheese, freshly grated
• 1 tablespoon fresh parsley, minced
• 1/8 teaspoon crushed red pepper flakes (optional)
• 1/2 teaspoon dried oregano
• 1/2 teaspoon kosher salt
• 1/2 teaspoon coarse ground black pepper

For Topping:

• 2 1/2 cups spaghetti sauce
• 1 cup shredded mozzarella cheese