Preheat oven to 350 degrees. Cook the cavatappi macaroni noodles according to the package directions until al dente. When finished, remove from heat, drain water out in a colander and pour the cooked noodles back into empty saucepan.
Grease baking dish with extra virgin olive oil, place chicken in it and cover with lid. Bake in oven until cooked through and there is no pink. About twenty minutes.
In a medium saucepan over low to medium heat, melt butter. Then add all-purpose flour. Stir with a whisk continually until mixture is lightly browned.
Pour the heavy cream, milk, salt, pepper and garlic powder in skillet slowly. Wisk until the mixture is thickened.
Turn heat down to simmer and stir in the shredded cheese. Continue stirring until the cheese is completely melted and a creamy texture. Remove from heat.
Pour noodles in baking dish and immediately pour the cheese sauce over the noodles. Stir until all is combined well.
Immediately pour the cheese sauce over the noodles. Stir until all is combined well.
Once the chicken is baked and cooled, shred it into fine pieces.
Add the chicken pieces to the macaroni and cheese and mix all together.
Pour the remaining shredded cheese over the top.
Bake uncovered at 350 degrees for five minutes.