Jumbo pasta shells stuffed with ricotta, spinach, and mozzarella baked in marinara sauce make a beautiful family dinner. This protein-rich vegetarian-friendly dish is perfect for batch cooking and freezer meals.
Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish and spread half of the marinara sauce over the bottom.
Cook the jumbo pasta shells in salted boiling water until just al dente, about 8–9 minutes. Drain and lay them on a tray to cool without sticking.
In a mixing bowl, combine ricotta, well-drained spinach, 3/4 cup mozzarella, Parmesan, the egg, garlic powder, herbs, salt, and pepper. Mix until fully combined and creamy.
Fill each cooled shell with the cheese-spinach mixture, using a tablespoon to avoid overstuffing and tearing.
Arrange filled shells in the baking dish over the marinara sauce. Spoon remaining marinara sauce over the shells and top with remaining 1/4 cup mozzarella. Cover with foil and bake for 20 minutes, then uncover and bake an additional 10 minutes until bubbly and lightly browned on top.