Cook pasta according to package directions. Reserve some pasta water.

Season the steak with salt and pepper. Sear it in a hot pan with olive oil until cooked to your liking. Remove the steak from the pan and let it rest.

In the same pan, melt the butter over medium heat.

Add minced shallot and cook until softened.

Add minced garlic, smoked paprika, and chili flakes. Cook for about a minute until fragrant.

Stir in the Dijon mustard.

Pour in the heavy cream and lemon juice, stirring to combine.

Add the fresh chopped parsley and chives to the sauce.

Stir in the grated Parmesan cheese until it's melted and the sauce is smooth.

Add the cooked pasta to the pan and toss everything together until the pasta is well coated in the sauce.

Serve the pasta in bowls, topped with the sliced steak and an extra spoonful of sauce.