Flatten chicken breast then add to large pan with oil and begin to pan fry at medium heat. Cook until done (internal temperature 165F). Set aside to rest.
Bring water to a boil and add pasta with a pinch of salt. Cook until andante. Drain water and set aside
Add diced onion to pan with butter and sauté.
Add heavy cream, cheddar cheese, American cheese, and seasonings. Stir in the pasta.
Chop the chicken into chunks. Add spinach and chicken to pan. Keep covered, stirring occasionally until cheese melts and spinach reduces.
Serve hot and enjoy!
