1. Pat steak dry with paper towels, then season with Cajun seasoning, salt, and pepper. Let sit at room temperature for 20 minutes.

2. Heat 1 tablespoon butter in a cast iron or heavy skillet over medium-high heat. Sear steak for 3–4 minutes per side until browned and cooked to desired doneness. Let rest, then slice thinly against the grain.

3. Cook pasta in a large pot of salted boiling water until al dente. Drain, reserving ½ cup of pasta water.

4. Lower skillet heat to medium and add 2 tablespoons butter. Sauté minced garlic for 30 seconds until fragrant.

5. Stir in Cajun seasoning and heavy cream. Simmer until sauce thickens slightly.

6. Add cooked pasta to the skillet. Mix in Parmesan cheese and toss until pasta is fully coated. Add pasta water as needed to loosen the sauce.

7. Top with sliced steak and garnish with parsley and optional red pepper flakes. Serve hot.