Begin by boiling a large pot of salted water. Add the rigatoni and cook according to package instructions until al dente. Reserve about a cup of the pasta water before draining.

In a large skillet over medium-high heat, add the olive oil. Once hot, add the steak tips, seasoning with Cajun seasoning, salt, and pepper. Sear until the steak is browned and cooked to your liking—about 3-4 minutes for medium.

Reduce the heat to medium-low, then add the heavy cream to the skillet, stirring to combine. Allow the sauce to simmer for a few minutes until it thickens, then stir in the grated Parmesan cheese until melted and creamy.

Add the cooked rigatoni to the skillet, tossing to mix well. If the sauce is too thick, add reserved pasta water gradually until reaching your desired consistency.

Garnish with fresh parsley and an extra sprinkle of Parmesan, if desired. Dig in and enjoy your hearty meal!