Instructions:

1. Cook the pasta:
   Boil fettuccine according to package instructions until al dente. Drain and set aside.
2. Season the proteins:
   Season steak with 1/2 tbsp Cajun seasoning in one bowl. In another bowl, toss shrimp with 1/2 tbsp Cajun seasoning.
3. Cook the steak:
   Heat 1 tbsp oil in a skillet over medium-high heat. Sear steak for 2-3 minutes per side until browned and cooked to your liking. Remove and set aside.
4. Cook the shrimp:
   In the same skillet, add more oil if necessary. Cook shrimp for 2-3 minutes until pink and opaque. Remove and set aside with the steak.
5. Make the Alfredo sauce:
   Melt butter in the skillet over medium heat. Sauté garlic until fragrant, about 1 minute.
   Pour in heavy cream, bringing it to a gentle simmer. Stir in Parmesan cheese and the remaining Cajun seasoning. Cook until smooth and slightly thickened, 2-3 minutes. Season with salt and pepper.
6. Combine everything:
   Add pasta to the skillet and toss to coat in the sauce. Gently mix in steak and shrimp, ensuring everything is heated through.
7. Serve:
   Top with fresh parsley and extra Parmesan if desired. Serve hot and enjoy the bold, creamy flavors!