# What You'll Need:
→ Chicken and Seasonings
01 - 2 cups cooked chicken breast, shredded
02 - 2 tablespoons fresh rosemary, finely chopped
03 - 2 cloves garlic, minced
04 - 1 tablespoon olive oil
05 - 1 teaspoon salt
06 - ½ teaspoon black pepper
→ Sauce
07 - 3 cups whole milk
08 - 3 tablespoons unsalted butter
09 - 3 tablespoons all-purpose flour
10 - ¼ teaspoon nutmeg
11 - ½ cup grated Parmesan cheese
→ Pasta and Assembly
12 - 12 no-boil lasagna noodles
13 - 2 cups shredded mozzarella cheese
14 - ½ cup grated Parmesan cheese (for topping)
→ Optional
15 - 1 cup baby spinach, roughly chopped
# Method:
01 - Preheat oven to 375°F.
02 - Heat olive oil in a skillet over medium heat. Add garlic and rosemary, sauté for 1 minute until fragrant. Stir in shredded chicken, salt, and pepper, toss to combine then remove from heat.
03 - Melt butter in a saucepan over medium heat. Whisk in flour and cook for 1 minute. Gradually whisk in milk, stirring constantly until thickened, 5 to 7 minutes. Season with nutmeg and stir in Parmesan cheese, then remove from heat.
04 - If using, stir chopped spinach into the chicken mixture.
05 - Spread a thin layer of béchamel sauce in a 9x13-inch baking dish. Place 3 lasagna noodles over sauce, then top with one-third of the chicken mixture, one-quarter of the béchamel, and one-quarter of the mozzarella cheese. Repeat layering twice more.
06 - Top with the remaining noodles, then spread the remaining béchamel sauce, mozzarella, and Parmesan cheese evenly over the top.
07 - Cover the dish with foil and bake for 30 minutes.
08 - Remove foil and bake an additional 10 to 15 minutes until golden and bubbling.
09 - Allow the dish to rest for 10 minutes before slicing and serving.
