Start by preheating your oven to 350°F (175°C).
Boil the spiral pasta in salted water according to the package instructions until al dente. Drain and set aside.
8 ounces Spiral Pasta
Melt the butter in a large skillet over medium heat. Once the butter has melted, sprinkle the flour and combine, stirring constantly to make a roux. Cook for 1 - 2 minutes.
1/4 cup Butter, 1/4 cup Flour
Gradually whisk in the milk and chicken broth. Bring the mixture to a simmer and let it thicken for 4-5 minutes. (Don't worry if it seems thin.)
2 cups Milk, 1 cup Chicken Broth
Season with nutmeg, salt, pepper, garlic powder, onion powder, and lemon pepper.
1/2 teaspoon Nutmeg, 1/2 teaspoon Garlic Powder, 1/2 teaspoon Onion Powder, 1 teaspoon Salt, ½ teaspoon Pepper, 2 teaspoon Lemon Pepper
Stir in the cream cheese, Parmesan, and sharp cheddar cheese until melted and smooth.
4 ounces Cream Cheese, 1/2 cup Parmesan Cheese, 8 ounces White Sharp Cheddar Cheese, 1/3 cup Sour Cream
Add the chopped artichokes, drained spinach, and sour cream, mixing until everything is combined. Mix in the cooked pasta.
1 cup Artichoke, 8 ounce Frozen Spinach, 3 cups Cooked Diced Chicken, 8 ounces Spiral Pasta
Transfer the pasta and sauce mixture into a greased 9 x 13 baking dish, spreading it out evenly.
In a small bowl, mix the breadcrumbs with melted butter until the crumbs are coated.
1 cup Panko Breadcrumbs, 2 tablespoons Melted Butter
Sprinkle the buttered breadcrumbs over the top of the pasta. Place the dish in the preheated oven and bake, uncovered, for 15-20 minutes until the top is golden brown and the casserole is bubbling.
Once baked, remove the casserole from the oven and let it rest for a few minutes before serving. Enjoy!