01 - Bring a large pot of salted water to boil. Cook bowtie pasta according to package directions until al dente. Drain while reserving ½ cup pasta water. Set pasta aside.
02 - Combine beef strips with olive oil, smoked paprika, Cajun seasoning, garlic powder, onion powder, salt, and black pepper in a medium bowl. Toss until evenly coated.
03 - Heat a large skillet over medium-high heat. Add seasoned beef strips and cook 3–4 minutes, stirring occasionally, until browned and cooked through. Remove from skillet and cover loosely to keep warm.
04 - Reduce skillet heat to medium. Add butter and minced garlic, sautéing 1 minute until fragrant.
05 - Pour in heavy cream and add cubed cream cheese. Stir continuously until cream cheese melts completely and sauce becomes smooth.
06 - Mix in Parmesan cheese, Cajun seasoning, and red pepper flakes if using. Simmer 2–3 minutes, stirring frequently, until sauce thickens. Season with salt and pepper to taste.
07 - Add drained pasta to the skillet, tossing thoroughly to coat. If sauce appears too thick, incorporate reserved pasta water gradually until desired consistency is achieved.
08 - Arrange spiced beef over pasta or toss gently to combine. Finish with chopped parsley and additional Parmesan cheese.