01 -
Preheat oven to 190°C (375°F) and coat a 23x33 cm (9x13 inch) baking dish with cooking spray. Set aside.
02 -
Boil pasta shells in salted water until al dente, approximately 11 minutes. Drain and gently toss with olive oil or cooking spray to prevent sticking.
03 -
In a large sauté pan, warm olive oil over medium heat. Add minced garlic and cook until fragrant, about 1 minute. Add fresh spinach and sauté until wilted, about 3 minutes. Remove from heat, drain excess liquid, cool slightly, then chop.
04 -
In a large bowl, combine chopped spinach, ricotta, 2 cups shredded mozzarella, Parmesan cheese, Italian seasoning, egg, salt, and black pepper. Mix thoroughly until homogeneous.
05 -
Stuff each pasta shell with approximately 2 heaping tablespoons of the filling mixture. Arrange stuffed shells in the prepared baking dish over the spread marinara sauce. Optionally, sprinkle with remaining shredded mozzarella.
06 -
Cover the dish with foil and bake in the preheated oven for 20 minutes. Remove foil and bake for an additional 5 minutes until cheese is bubbly and lightly browned.
07 -
Garnish with chopped parsley if desired. Serve warm.