01 -
Set your oven to 350°F and let it heat up.
02 -
Chop up the cooked chicken into small, easy-to-eat chunks.
03 -
Cook your penne in boiling water for about 9 minutes. It should still have a slight bite to it. Drain the water afterward.
04 -
Throw the chicken, pasta, 20 ounces of mozzarella, all the Parmesan, and most of the sauce together in a big bowl. Keep about a cup of sauce aside for later. Stir until it's all mixed well.
05 -
Spread the mixture evenly in a greased casserole dish (9x13 inch). Pour the reserved sauce over the surface, then sprinkle the remaining mozzarella cheese on top.
06 -
Stick the dish in the oven for 30 minutes. It's done when the cheese is melted and everything's hot all the way through.
07 -
Take it out of the oven and serve it while it's still warm.