Chicken Broccoli Alfredo Stuffed Shells

Name: Chicken Broccoli Alfredo Stuffed Shells
Prep time: 30 min
Cook time: 25 min
Total time: 55 min
Cuisine: European, Italian, Mediterranean
Ingredients: 1 box (12 ounces) Jumbo Shells; 2 cups cooked, shredded chicken ((a rotisserie chicken works great for this recipe)); 1/4 teaspoon garlic powder; Salt and pepper (to taste); 1 bag (12 ounces) frozen broccoli florets (steamed then chopped); 1 jar (16 ounces) Alfredo sauce OR use the homemade Alfredo recipe below; 1 cup shredded Mozzarella cheese; 1/2 cup grated Parmesan cheese; 3 tablespoons unsalted butter; 3 cloves garlic (minced); 1 cup heavy cream; 1 ¼ cups whole milk; 2/3 cup freshly shredded Parmesan; 3/4 cup freshly shredded Mozzarella cheese