Season the sirloin steak with salt and pepper.
Cook fettuccine pasta according to package instructions.
In a large skillet, heat olive oil over medium heat and sauté garlic until fragrant.
Add the sirloin steak slices and cook until browned to your liking.
Reduce the heat and pour in the heavy cream, Parmesan cheese, and Gorgonzola cheese.
Stir until the cheeses melt and the sauce thickens.
Add the cooked fettuccine pasta to the skillet and toss to combine with the sauce.
Garnish with fresh parsley before serving.