Follow these steps, and you’ll have a delicious dish ready to enjoy:

1. Preheat your oven to 375°F. Bring a large pot of salted water to a boil and cook the pasta shells until al dente. Drain and set aside.
2. In a large bowl, combine the ricotta, chopped spinach, half of the mozzarella, Parmesan, egg, garlic, oregano, salt, and pepper. Mix until everything is well combined.
3. Spread one cup of marinara sauce over the bottom of a 9×13-inch baking dish.
4. Stuff each shell with a generous amount of the spinach and cheese mixture. Arrange the stuffed shells in the baking dish, open side up.
5. Pour the remaining marinara sauce over the shells and sprinkle with the remaining mozzarella cheese.
6. Cover the dish with foil and bake in the preheated oven for 25 minutes. Remove the foil and bake for an additional 10 minutes, or until the cheese is bubbly and golden.
7. Let the dish cool for a few minutes before serving.

These shells are a staple for a reason. They remind me of my grandmother’s knack for turning simple ingredients into something extraordinary, and they’re just as forgiving if you need to tweak the recipe to fit what you have on hand.