1. Bring a large pot of salted water to a boil. Add spaghetti and cook according to package instructions until al dente. Drain and set aside.

2. In a large skillet over medium heat, cook the ground beef until browned and cooked through. Drain any excess fat, season with Cajun seasoning, and set aside.

3. In the same skillet, melt butter and sauté minced garlic until fragrant. Whisk in the flour and cook for a minute to eliminate the raw taste.

4. Slowly pour in milk and heavy cream, whisking constantly to avoid lumps.

5. Lower the heat and stir in Parmesan, cream cheese, and mozzarella. Stir until the cheese is melted and the sauce is smooth. Season with salt and pepper.

6. Add the cooked spaghetti and seasoned beef back into the skillet. Toss to coat everything in the creamy sauce.

7. Serve warm and garnish with fresh parsley if desired.