Start by marinating the chicken.
Combine the chicken breasts with the Italian dressing in a sealed container and refrigerate for one to two hours.
Boil the cavatappi pasta according to the package instructions.
Drain and set aside while you prepare the rest.
Heat olive oil in a skillet over medium heat.
Add the marinated chicken breasts.
Sear each side for about 5 minutes until fully cooked.
Ensure the internal temperature reaches 165°F.
Melt butter in a large saucepan.
Add minced garlic and sauté for 1-2 minutes.
Pour in the heavy cream.
Bring it to a simmer, stirring frequently.
Stir in the Parmesan and mozzarella cheeses until melted and smooth.
Combine the cooked pasta with the sauce.
Slice the chicken and serve it atop the pasta.