In a large pot, bring salted water to a boil and cook the fettuccine according to package instructions until al dente. Drain and set aside.

In a skillet, heat olive oil over medium heat. Add the sliced chicken and season with salt, pepper, and Cajun seasoning. Cook until golden and cooked through, about 5-7 minutes. Remove from skillet and set aside.

In the same skillet, add chicken broth, heavy cream, garlic powder, and onion powder. Stir and bring to a simmer.

Add grated Parmesan cheese and stir until melted and smooth. Adjust seasoning with salt and pepper.

Add the cooked fettuccine and chicken back into the skillet. Toss to coat in the creamy sauce. Cook for an additional 2-3 minutes to heat through.

Garnish with chopped parsley before serving.