Cook rigatoni pasta according to package directions.
Reserve 1 cup of pasta water.
In a blender, combine cottage cheese, pasta sauce, crushed garlic, and seasonings.
Blend until smooth and creamy.
Add the blended sauce to a pan over medium heat.
Stir in the spinach and cook until wilted.
Add the cooked pasta and parmesan cheese to the pan.
Stir to combine and coat the pasta with the sauce.
If the sauce is too thick, add some of the reserved pasta water until desired consistency is reached.
Serve topped with grilled chicken.
