Start by preheating your oven to 375°F (190°C). A hot oven is crucial for even baking. Trust me; you want to kick off your cooking right!
In a large pot, bring water to a boil. Add a pinch of salt and the broccoli florets. Cook for about 2-3 minutes until bright green and tender. Drain them and set aside. This step retains the vivid color and crunch!
In a medium saucepan, melt the butter over medium heat. Whisk in the flour and cook for about a minute. Then, gradually whisk in the chicken stock, stirring continuously to avoid lumps. Add sherry, milk, cream, nutmeg, and sage. Keep stirring until the sauce thickens; it’ll take about 5-7 minutes.
In a large mixing bowl, combine your cooked chicken, drained broccoli, and sun-dried tomatoes. Pour the creamy sauce over this mixture and stir gently. Mix until everything is evenly coated. This is where the magic truly begins as the flavors meld together!
In a large baking dish, spread the chicken and broccoli mixture evenly. Top it with a blend of Parmesan and cheddar cheese. Then, finish it off with seasoned breadcrumbs for a delightful crunch.
Bake your chicken divan in the preheated oven for about 25-30 minutes, or until the top is golden brown and bubbling. Your kitchen will be filled with an enticing aroma that will make everyone come running!