Bring a large pot of salted water to a rolling boil over high heat. Add pasta and cook until al dente, about 8-10 minutes. Drain and set aside.

Heat olive oil in a large skillet over medium-high heat. Sear steak bites for 3-4 minutes until browned, then remove and keep warm.

Lower heat and melt butter in the same skillet. Add heavy cream and Cajun seasoning, stirring for 2-3 minutes until slightly thickened.

Add cooked pasta to the skillet, toss to coat. Gradually mix in Parmesan cheese until melted. Fold in steak bites and heat through.

Transfer to a serving dish, optionally garnish with additional Parmesan and parsley. Serve immediately.