01 - Preheat the oven to 175°C. Rub the beef roast with olive oil, salt, and pepper.
02 - Place the beef on a roasting rack in a roasting pan and roast for 1 hour and 30 minutes, or until the internal temperature reaches 57°C for medium rare.
03 - Remove the beef from the oven and let it rest for at least 15 minutes before slicing thinly.
04 - In a food processor, combine parsley, cilantro, capers, garlic, Dijon mustard, red wine vinegar, and olive oil. Blend until smooth. Season with salt and pepper to taste.
05 - Serve the sliced beef chilled or at room temperature, drizzled with the green sauce.