Mix all marinade ingredients in a medium bowl. Spread the marinade evenly over both sides of each steak. Marinate at room temperature for 1 hour.
Preheat the grill to high heat (oven grill setting) or light charcoal until the coals glow white.
Grill the steaks 4-5 minutes per side for rare (internal temperature 50-55°C / 120-130°F), 5-6 minutes per side for medium-rare (55-63°C / 130-145°F), or 8+ minutes per side for well-done (71°C+ / 160°F+).
Place the steaks on a preheated plate and let rest for 10 minutes before serving.