Coat chicken with olive oil and all seasonings, cover, and marinate for 30 minutes
Heat avocado oil and butter in a skillet over medium-high heat
Sear chicken for 5 minutes per side until golden, deglaze with a little chicken broth, cover, and simmer until internal temp reaches 155°F
Remove chicken, cover in foil, and keep warm in the oven
Cook fettuccine in heavily salted boiling water until al dente, reserve ¼ cup pasta water, then drain
In the same pan over medium heat melt butter and sauté shallot for 1–2 minutes
Add garlic and cook until fragrant, about 30 seconds
Season with oregano, garlic powder, chili flakes, salt, and pepper
Pour in heavy cream and simmer for 3–5 minutes until slightly thickened
Lower heat and stir in Parmesan and pasta water until smooth
Add fettuccine and parsley and toss until fully coated
Stir in an additional ¼ cup Parmesan
Slice the chicken and lay over the pasta
Finish with extra Parmesan, cracked pepper, or chili flakes
