#1 Preheat oven to 375°F. Lightly oil or spray a 9x13 baking dish. Cook pasta shells in salted boiling water until just al dente, about 8–9 minutes. Drain and rinse under cold water #2 In a skillet, heat olive oil over medium heat. Add garlic and sauté 30 seconds. Add spinach and cook until wilted. Let cool slightly #3 In a bowl, mix ricotta, ½ cup mozzarella, Parmesan, egg, salt and pepper. Stir in cooled spinach #4 Spread 1 cup marinara sauce in the baking dish. Stuff each shell with 1–2 tablespoons of filling and place open side up in the dish. Spoon remaining marinara over the shells. Sprinkle with the rest of the mozzarella. Cover with foil and bake for 25 minutes. Uncover and bake another 5–10 minutes, until cheese is melted and bubbly #5 Let cool for 5 minutes before serving. Garnish with fresh basil or extra Parmesan if desired. Serve and enjoy!