Heat the chicken and Italian dressing in a 12-inch cast iron skillet set over medium high heat (If you don't own a large skillet, you can use a stock pot). Season chicken with salt and pepper to taste.
3 boneless, skinless chicken breasts, 2 tablespoons Italian dressing, Kosher salt and freshly ground black pepper
Cook chicken until browned and just cooked through, about 5 minutes depending on thickness of chicken.
Add the box of pasta and the entire jar of marinara. Fill the empty marinara jar with water and add to the skillet. If using a stockpot, use 2 cups water. Lightly stir the mixture to combine.
16 ounces dry rigatoni pasta, 24 ounces Marinara sauce
Bring mixture to a boil and then reduce to a simmer. Cover and cook for 15 minutes or until pasta is tender to your liking (see note).
Cover with grated Parmesan and then shredded mozzarella. No need to stir. Continue to cook for 2-3 more minutes or until cheese is fully melted. You can also broil the entire skillet for about 4 minutes to make the cheese extra melty!
½ cup freshly shredded mozzarella cheese, ½ cup freshly grated Parmesan cheese
Top with chopped basil (optional) and serve! Enjoy!
Chopped fresh basil