If using Marinating Steak or Medallions such as Inside Round Marinating Medallions, pierce meat all over with a fork before marinating, and marinate for 4 to 12 hours.
Combine soy sauce, sugar, ginger root, garlic, vegetable oil and sesame oil (if using), in large seal-able freezer bag.
Add steak to the marinade; marinate in the fridge for 30 minutes to 2 hours.
Remove steak from marinade, discarding marinade*; pat steaks dry with paper towel.
Grill over medium-high heat for 10 to 12 minutes, turning at least twice for medium-rare doneness 145°F (63°C). Cover steaks loosely with foil and let steaks rest for 5 to 10 minutes.
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.