01 - Cook bowtie pasta in a large pot of salted boiling water according to package directions until al dente. Drain well, reserving 1/2 cup of pasta cooking water. Set pasta aside.
02 - In a medium bowl, combine beef strips with olive oil, smoked paprika, Cajun seasoning, garlic powder, onion powder, salt, and black pepper. Toss until evenly coated.
03 - Heat a large skillet over medium-high heat. Add seasoned beef and cook 3-4 minutes, stirring occasionally, until browned and cooked through. Transfer to a plate and cover loosely to keep warm.
04 - Reduce skillet heat to medium. Add butter and minced garlic, sautéing 1 minute until fragrant but not browned.
05 - Pour in heavy cream and add cubed cream cheese. Stir continuously until cream cheese melts completely and sauce becomes smooth.
06 - Stir 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 is too thick, add reserved pasta water 1 tablespoon at a time until desired consistency is achieved.
08 - Top pasta with cooked spiced beef, either tossing gently to combine or arranging as a garnish. Sprinkle with fresh parsley and additional Parmesan cheese. Serve immediately.