Cook pasta according to package directions. Drain and set aside. While the pasta is cooking, prep the vegetables and the chicken.
Heat the oil in a skillet until shimmering.
Add onion and saute on medium heat until starting to soften (1 to 2 minutes).
Add chorizo and chicken and cook until browned and fully cooked (about 6 minutes). Use a wooden spoon or spatula to break up the bulk sausage into bite-sized chunks.
Stir in garlic, mushrooms, bell pepper and cinnamon (if using). Cook until the vegetables are starting to soften (about 3 minutes), stirring often.
Pour in the cream. Bring to a boil and cook, stirring continuously, until the sauce has thickened (a few minutes).
Season the sauce with salt and pepper, then stir in the pasta. Sprinkle with parsley (optional) and serve.
