01 - 
                Cook the jumbo pasta shells according to the package directions. Drain and let cool slightly.
              
              
              
                02 - 
                In a large skillet, heat olive oil over medium heat. Add diced chicken, season with salt, pepper, and garlic powder, and cook until golden and fully cooked through, about 7-8 minutes. Remove and set aside.
              
              
              
                03 - 
                In the same skillet, melt the butter over medium heat. Add minced garlic and sauté for 1-2 minutes. Stir in the cream, chicken broth, and Italian seasoning. Let simmer for 3-4 minutes. Add Parmesan and mozzarella cheese, stirring until melted and smooth.
              
              
              
                04 - 
                Return the cooked chicken to the skillet and mix it into the Alfredo sauce until well coated.
              
              
              
                05 - 
                Fill each pasta shell with the creamy chicken mixture. Place them in a baking dish in a single layer.
              
              
              
                06 - 
                Pour any leftover Alfredo sauce over the shells and sprinkle with extra mozzarella. Bake at 375°F (190°C) for 15-20 minutes until bubbly and melted.
              
              
              
                07 - 
                Top with fresh parsley and serve warm.