First Step: COOK THE PASTA

1. Boil the Pasta: Bring a large pot of salted water to a boil. Add the fettuccine pasta and cook according to the package instructions until al dente (usually around 9-11 minutes).
2. Drain the Pasta: Once cooked, reserve about 1/2 cup of pasta water and drain the rest. Set the cooked pasta aside while you prepare the shrimp and steak.

Second Step: COOK THE SHRIMP AND STEAK

1. Season the Shrimp: Season the shrimp with Cajun seasoning, salt, pepper, and garlic powder. Toss to coat the shrimp evenly.
2. Sear the Shrimp: Heat 1 tablespoon of olive oil in a large skillet over medium-high heat. Once hot, add the shrimp in a single layer. Cook for 2-3 minutes per side, or until the shrimp are pink and opaque. Remove the shrimp from the skillet and set aside.
3. Season the Steak: Season the steak with Cajun seasoning, salt, and pepper. Let the steak sit for a few minutes to absorb the seasoning.
4. Cook the Steak: In the same skillet, add another tablespoon of olive oil and 1 tablespoon of butter over medium-high heat. Once the butter is melted and the skillet is hot, add the steak. Cook for about 4-5 minutes per side, or until it reaches your desired level of doneness. For medium-rare, aim for an internal temperature of 130°F (54°C). Remove the steak from the skillet and let it rest for a few minutes before slicing it thinly against the grain.

Third Step: MAKE THE CAJUN ALFREDO SAUCE

1. Melt the Butter: In the same skillet you used for the shrimp and steak, melt 2 tablespoons of butter over medium heat.
2. Sauté the Garlic: Add the minced garlic to the butter and sauté for about 1 minute, until fragrant. Be careful not to burn the garlic.
3. Make the Roux: Sprinkle the flour over the garlic and butter mixture, whisking constantly to form a roux. Cook for about 1 minute, allowing the flour to cook through.
4. Add the Milk and Cream: Slowly pour in the heavy cream and whole milk, whisking continuously to prevent lumps. Bring the mixture to a gentle simmer, allowing it to thicken.
5. Add the Cheese: Stir in the grated Parmesan and mozzarella cheeses, letting them melt into the sauce. Continue to stir until the sauce is smooth and creamy.
6. Season the Sauce: Add Cajun seasoning, onion powder, salt, and pepper to taste. Adjust the seasoning according to your preference, adding more Cajun seasoning if you like extra heat.
7. Simmer the Sauce: Let the sauce simmer for 2-3 minutes, stirring occasionally, until it thickens to your desired consistency. If the sauce is too thick, you can add some of the reserved pasta water to thin it out.

Fourth Step: Combine the Pasta, Shrimp, and Steak

1. Add the Pasta to the Sauce: Add the cooked fettuccine pasta to the skillet with the Alfredo sauce. Toss the pasta in the sauce, making sure it’s well coated. If needed, add a little pasta water to help the sauce adhere to the pasta.
2. Add the Shrimp and Steak: Gently toss the cooked shrimp and sliced steak into the pasta, ensuring everything is evenly distributed.
3. Toss Everything Together: Give everything a final toss to combine the shrimp, steak, and pasta with the creamy Cajun Alfredo sauce.

Final Step: Garnish and Serve

1. Garnish: Sprinkle chopped fresh parsley over the top of the dish for a pop of color and fresh flavor. You can also add extra grated Parmesan cheese and crushed red pepper flakes for added flavor and heat.
2. Serve: Serve the Cajun Shrimp and Steak Alfredo immediately, with lemon wedges on the side for a fresh burst of citrus. Pair it with a crisp, chilled white wine like Chardonnay or a light beer for a refreshing contrast to the richness of the dish.