Begin by bringing a large pot of water to a boil. Add a generous handful of salt and the jumbo shells. Stir occasionally to prevent sticking. Cook according to the package instructions, typically around 10 to 12 minutes, until the shells are al dente.
Once cooked, drain the shells in a colander. Rinse them under cold water to stop the cooking process and prevent them from sticking together. Set them aside while you prepare the filling.
In a heavy-bottomed deep skillet, melt the salted butter over medium-high heat. Once the butter is completely melted, reduce the heat to medium and add the minced garlic. Sauté for a couple of minutes until fragrant, stirring to ensure it doesn’t burn.
Pour in the heavy cream and stir well, allowing it to combine with the garlic and butter. Bring the mixture to a gentle simmer.
Whisk in the freshly grated parmesan cheese gradually, stirring continuously until melted and the sauce is smooth. Taste the sauce and season with salt and pepper as desired. Once ready, set it aside.
In a large bowl, combine the shredded chicken, beaten eggs, frozen spinach, ricotta cheese, shredded mozzarella cheese, grated parmesan cheese, herbs, and Italian seasoning. Mix everything together until well combined.
Add half of the prepared alfredo sauce to the filling mixture, stirring until it's evenly distributed throughout.
Preheat your oven to 375°F (190°C) and grease a 9x13 baking pan with a little butter or cooking spray.
Carefully fill each jumbo shell with the chicken and cheese filling, making sure not to overstuff them. Place the filled shells in the prepared baking pan.
Once all the shells are filled, pour the remaining alfredo sauce over the tops of the shells, ensuring even coverage.
Sprinkle the remaining shredded mozzarella cheese over the shells and place the baking pan in the preheated oven. Bake for about 25 to 30 minutes, or until the cheese is bubbly and golden.
When done, remove from the oven and let them cool slightly before serving. Enjoy your hearty Chicken Alfredo Stuffed Shells hot!
