Season the steaks with salt and pepper.
In a skillet over medium-high heat, melt 1 tablespoon butter and add the steaks. Cook until browned on both sides and remove from pan.
In the same pan, add shallot and garlic, cooking until softened.
Carefully add brandy to the pan to deglaze, allowing it to flambé.
Once the flames subside, add beef broth, Dijon mustard, and Worcestershire sauce. Bring to a simmer.
Stir in heavy cream and remaining butter, simmering until the sauce thickens.
Return steaks to the pan, spooning the sauce over them to reheat.
Stir in parsley and lemon juice before serving.