Preheat your oven to 375°F (190°C). Bring a large pot of salted water to a boil and cook the jumbo shells for about 9-10 minutes until al dente.
In a large bowl, combine ricotta cheese, half of the mozzarella, half of the Parmesan, egg, minced garlic, and Italian herbs, seasoning with salt and pepper. Mix until creamy.
Drain the cooked shells and cool slightly. Stuff each shell with the ricotta mixture.
In a baking dish, spread a layer of marinara sauce, place the stuffed shells, top with more sauce, and sprinkle remaining mozzarella and Parmesan over the top.
Cover with foil and bake for 25 minutes. Remove the foil and bake an additional 10-15 minutes until cheese is bubbly and golden.
Let sit for 5 minutes before serving and garnish with fresh parsley.
Notes
Experiment with different cheese combinations or add vegetables for a delicious twist!