Slice the mushrooms into thin strips and sauté them over high heat until golden brown. Season them with a little salt. Next, slice the chicken into evenly sized strips. Season the chicken with salt and pepper and sauté the chicken until golden brown.
In a medium saucepan, whisk the heavy whipping cream, butter or margarine, pressed garlic, and grated parmesan cheese together. Cook the sauce over medium-low heat until smooth.
Add the cooked fettuccine, mushrooms, and chicken into the sauce. Toss everything together until well-combined and remove from heat.
Serve warm and topped with freshly grated parmesan. Enjoy!