01 - Bring a large pot of salted water to boil. Cook bowtie pasta according to package directions until al dente. Drain, reserving 1/2 cup pasta water, and set 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 and cook 3-4 minutes, stirring occasionally, until browned and cooked through. Remove from skillet, cover loosely, and set aside.
04 - Reduce skillet heat to medium. Add butter and minced garlic. Sauté 1 minute until fragrant.
05 - Pour in heavy cream and add cubed cream cheese. Stir constantly until cream cheese melts and sauce is 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 sauce, tossing to coat completely. If sauce is too thick, add reserved pasta water a small amount at a time until desired consistency is reached.
08 - Top pasta with cooked spiced beef. Either toss gently to distribute or arrange beef on top as garnish. Sprinkle with chopped parsley and additional Parmesan before serving.