BEEF SIRLOIN STEAKS WITH FRESH HERBS (COTES DE BOEUF AUX HERBES)

Steps:

• In a cast-iron frying pan over high heat, melt the butter with the olive oil until the mixture turns a light brown.
• Add the steaks and sear well, about 1 minute.
• Turn, sprinkle with sea salt, and brown on the second side for 1 minute more.
• Turn again, reduce the heat slightly, and cook, turning once, for about 6 minutes on each side for rare, or until done to your liking.
• Transfer to a platter, tent with aluminum foil, and let rest for 5 to 8 minutes before carving.
• Meanwhile, make the sauce: In a saucepan over medium heat, melt 2 tablespoons of the butter.
• Add the shallots and saute until softened but not colored, about 30 seconds.
• Add the stock, bring to a boil and cook until reduced by half.
• Remove from the heat and stir in the mustard, the remaining 1 tablespoon of butter, and the herbs.
• Stir in any juice that has collected on the platter holding the beef.
• Season with salt and pepper; pour into a warmed bowl.
• Transfer the steaks to an attractive cutting board and sprinkle them with pepper, then carry the board to the table.
• Cut along the bone to free the meat then carve in slices diagonally across the grain. Pass the sauce at the table.