Cook the lasagna noodles until they’re al dente and let them drain on paper towels.
Combine the chicken with the drained chilies, half the mozzarella and the cream cheese.
Add salt and black pepper.
Melt the butter in a big skillet and whisk in the flour.
Cook for 1 minute and then whisk in the milk and cook for a few minutes until thickened.
Stir in the parmesan cheese.
Preheat the oven to 350°F.
Pour enough of the sauce into a 9-inch baking dish to cover the bottom.
Add 3 of the lasagna noodles on top then add half the chicken mixture, another noodle layer, the rest of the chicken mixture and another noodle layer.
Pour the rest of the sauce over the top and then sprinkle over the remaining mozzarella.
Bake for 30 to 45 minutes or until the cheese is melted on top and the lasagna is hot.
Let it rest for 10 minutes, add any toppings you want, and then slice and serve.