A classic Italian comfort food dish, these Easy Spinach Stuffed Shells never fail to disappoint!
Preheat oven to 350 degrees.
Cook pasta according to package directions.
In a large bowl, combine ricotta cheese, 2 cups mozzarella cheese, parmesan cheese, eggs, parsley, oregano, spinach, garlic, salt, pepper and red pepper flakes.
In a 13x9-inch baking dish or large casserole dish, spread about 1/2 cup of the marinara sauce. Fill each of the cooked shells evenly with the ricotta mixture. Place 15 of the stuffed shells into the prepared dish. Top with half of the remaining marinara sauce. Top with remaining 15 shells and then top with remainder of marinara. Sprinkle with remaining one cup of shredded mozzarella. Cover with foil and bake for 35 minutes or until shells look bubbly.