Cook pasta in salt water according to package instructions. In the last 2 minutes of pasta cooking, add in broccoli. Drain and set aside.
Dice 2 cups rotisserie chicken.
Making the sauce: In a large skillet. melt the butter and add in garlic for 1 minute. Stir in the flour for 1 minute. Slowly add milk. Bring to a low simmer for 2 minutes whisk frequently to thicken. Sprinkle in the cheeses and give it a really good stir.
Assembling the casserole: Combine the noodles, sauce, chicken and broccoli. Place in a greased 9x13 casserole dish topped with shredded mozzarella cheese.
Place in the oven uncovered for 10 minutes. Let it sit for 5 - 10 minutes before serving. Enjoy!
Video
Notes
If you would like before you place in the oven you can add 1/2 cup breadcrumbs or crushed ritz crackers on the very top.