01 - Cook bowtie pasta in large pot of salted boiling water until al dente per package directions. Drain while reserving ½ cup pasta water. Set aside.
02 - Combine beef strips with olive oil, smoked paprika, Cajun seasoning, garlic powder, onion powder, salt, and black pepper in medium bowl. Toss until evenly coated.
03 - Heat 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, set aside loosely covered.
04 - Reduce skillet heat to medium. Add butter and minced garlic. Sauté 1 minute until fragrant.
05 - Pour heavy cream into skillet. Add cubed cream cheese. Stir continuously until cream cheese melts completely and sauce achieves smooth consistency.
06 - Whisk in Parmesan cheese, Cajun seasoning, and red pepper flakes if using. Simmer 2–3 minutes, stirring frequently, until sauce thickens. Adjust seasoning with salt and pepper to taste.
07 - Add drained pasta to sauce, tossing thoroughly to coat. If sauce consistency is too thick, incorporate reserved pasta water gradually until desired texture achieved.
08 - Arrange cooked spiced beef over pasta. Either toss gently to distribute or leave beef atop as garnish.
09 - Sprinkle with chopped fresh parsley and additional Parmesan cheese. Serve immediately while hot.