Wash the chicken and pat it dry with paper towels.
Coat both sides of the chicken with the smoked paprika, Italian seasoning, thyme, and salt.
Preheat the garlic olive oil in a large pan over medium-high heat.
Sear the chicken breasts for 3 minutes on each side.
Lower the temperature to medium, cover the pan with a lid, and cook the chicken for 10 to 13 minutes, flipping every few minutes until the internal temperature registers 165 degrees.
Cool the chicken until safe enough to handle. Then, shred it and set it aside.
Lasagna
Preheat the oven to 425 degrees.
Boil the lasagna according to the package directions for al dente. Then, drain and toss with olive oil.
When the lasagna noodles are cool, cut them up into small pieces.
Melt the butter in a pan over medium heat. Then, whisk in the flour and cook for a minute.
Whisk in the milk 1 cup at a time, whisking as you go, until all the milk is added.
Add the black pepper, salt, Italian seasoning, and dried basil. Then, continue cooking and whisking until the sauce begins to bubble and thicken.
Add the garlic, broccoli, spinach, ½ cup of parmesan cheese, and the shredded chicken. Continue cooking for another 2 to 3 minutes until the sauce begins to bubble again. Remove the pan from the heat and stir in the lasagna noodles.
Transfer the mixture to a 13x9 baking dish and top it with the remaining parmesan. Then, bake uncovered for 30 minutes until the top is golden brown.
Video
Notes
Storage
Refrigerate for up to 3 days in an airtight container.
Freeze for up to 3 months in an airtight, freezer-safe container.
Defrost if frozen, then reheat the entire dish over medium-low heat or microwave individual portions at 1-minute intervals.
Tips
Sear the chicken on medium-high heat to get a good crust, then reduce the heat to prevent burning as the chicken continues to cook.
Shred your chicken as soon as you can safely handle it. Hot meat shreds much more easily than cool meat.
Be sure to whisk and cook the roux for at least a minute to maximize its thickening power.
Whole milk is the best choice for this recipe. Reduced-fat or skim milk makes the sauce too thin.
Be sure to whisk constantly as you cook the sauce to prevent scorching and ensure everything is properly mixed.