An umami-rich overnight marinade transforms beef tenderloin, an already excellent and impressive cut of meat, into marinated beef tenderloin, a special yet easy dinner. Prep: 10 min. + marinating ...

Mix until well combined. Place beef in another medium bowl. Add half the marinade and toss to coat. Marinate at room temperature for at least 10 minutes. Warm oil in a large pan or wok over high heat.