Bring water to a boil in a large pot and cook the pasta according to package directions until al dente.
Season chicken with 1/2 teaspoon each of salt and black pepper and 1 teaspoon of Italian seasoning.
Melt butter in the skillet over medium heat and cook the chicken for 5-6 minutes per side until it is cooked through.
Remove the chicken from the pan and set aside to rest for a few minutes before slicing.
Add more butter to the pan, if necessary. Then add in the garlic and lemon juice and cook for 30 seconds until fragrant.
Add in the flour and mix until slightly browned, about 30 seconds-1 minute.
Whisk in the coconut milk or heavy cream. Cook, stirring occasionally until slightly thickened and creamy.
Turn off the heat, add in the spices, parmesan and spinach.
Stir until the spinach is wilted. Add the pasta back to the pan to coat with the sauce.
Top with the sliced chicken, more parmesan, serve and enjoy.