Heat the 1 Tablespoon oil in a skillet. Season the 1½ pounds boneless skinless chicken breast with ¼ teaspoon salt, ¼ teaspoon pepper and ¼ teaspoon garlic powder. Cook over medium heat until cooked through. Dice into small cubes and set aside.
In a large skillet or sauce pan, melt 10 Tablespoons butter over medium heat. Stir in ½ teaspoon garlic powder. Add 12 ounces cream cheese and 3 cups whole milk then cook until slightly bubbly, stirring frequently.
Remove from heat and stir in the 1½ cups Parmesan cheese and 1½ cups chicken broth, then set aside.
Roughly chop the 12 ounces broccoli into small pieces.
Assembly
Ladle about a cup of sauce into the bottom of the pan.
Cover with a layer of about 4 lasagna noodles.
Sprinkle with chopped chicken and bacon if desired. Spoon another cup or so of sauce over the chicken.
Add another layer of lasagna noodles followed by the chopped broccoli and 2 cups of the mozzarella cheese.
Top with the remaining lasagna noodles. Spoon the remaining sauce on top then sprinkle with the remaining mozzarella.
Cover tightly with foil and bake for 45 minutes. Then remove the foil and bake for about 15 more or until sauce is bubbly and the cheese is browned to your liking.
Let rest for at least 10 minutes before cutting and serving.