This tasty dish is a hit, even for those who are super picky.

Preheat your oven to 375°F (190°C). Cook the lasagna noodles according to the package instructions, then drain and set aside.

In a medium saucepan, melt the butter over medium heat. Once melted, whisk in the flour and cook for about 1-2 minutes to form a roux.

Slowly add the milk to the roux, whisking continuously to avoid lumps. Cook until the sauce thickens and coats the back of a spoon, about 5-7 minutes.

Stir in the Parmesan cheese, garlic powder, onion powder, and Italian seasoning. Season with salt and pepper to taste.

In a large bowl, combine the cooked chicken, half of the mozzarella cheese, and the chopped spinach. Mix well.

To assemble the lasagna, spread a thin layer of the white sauce on the bottom of a 9×13-inch baking dish. Place three lasagna noodles on top.