01 -
Generously coat steak cubes with Cajun seasoning, ensuring even coverage.
02 -
Prepare rigatoni according to package instructions until al dente, reserving 1 cup of pasta water before draining.
03 -
Heat olive oil over medium-high in a large skillet. Sear steak cubes for 2-3 minutes per side until browned and cooked to preference. Remove and set aside.
04 -
In the same skillet, melt butter over medium heat. Add diced onion and sauté for 3-5 minutes until translucent. Stir in minced garlic and cook for 1 minute until fragrant.
05 -
Deglaze skillet with chicken broth, scraping browned bits. Bring to a simmer, then add heavy cream. Cook gently for 5-7 minutes, stirring occasionally until slightly thickened.
06 -
Lower heat. Gradually add Parmesan cheese, stirring continuously until melted and sauce is smooth. Adjust consistency with reserved pasta water as needed. Season with salt and pepper.
07 -
Return cooked rigatoni and seared steak to sauce. Toss gently to coat evenly in creamy Parmesan sauce.
08 -
Plate immediately, garnishing with chopped parsley and optional red pepper flakes for added heat and color.