1. Season the steak bites with Cajun seasoning, smoked paprika, garlic powder, salt, and black pepper. Toss until the meat is evenly coated.

2. Heat the olive oil in a large skillet over medium-high heat. Add the steak bites in a single layer and sear until browned on all sides, about 3–4 minutes. Remove the steak from the skillet and set aside.

3. Cook the cheese tortellini according to the package instructions in a pot of salted boiling water. Reserve 1/2 cup of the pasta water, then drain the tortellini and set aside.

4. In the same skillet used for the steak, reduce the heat to medium and add the butter. Once melted, stir in the minced garlic and cook for about 30 seconds, until fragrant.

5. Add the red pepper flakes (if using) and Dijon mustard, then pour in the lemon juice. Stir to combine, then add the chopped parsley and chives to create the cowboy butter sauce.

6. Add the cooked tortellini to the skillet with the cowboy butter sauce. Pour in the reserved pasta water and sprinkle in the grated Parmesan cheese. Toss gently until the sauce thickens slightly and coats the tortellini.

7. Return the seared steak bites to the skillet and toss everything together until warmed through. Taste and adjust seasoning with extra salt, pepper, or lemon if needed.

8. Serve immediately, garnished with extra fresh herbs and Parmesan, if desired.