Slice the ginger root into thin coins. You can leave the skin on.
Combine the pineapple juice, Kikkoman® Soy Sauce, ginger pieces, and juice of 1/2 lime in a large baking dish or gallon sized resealable bag.
Cut the steak into 8 oz portions. Add the steak to the marinade mixture.
Refrigerate the steaks in the marinade for at least one hour, or up to overnight. The longer the better as the acid of the pineapple juice will tenderize the meat.
When ready, remove the steaks from the marinade. Grill the steaks over medium heat until they reach your desired doneness. This will vary with the thickness of the steak, approximately 5-7 minutes per side for medium (140F). Use a thermometer to check the internal temperature for doneness.
Notes
This steak goes well with most any sides. We love to serve it with pasta salad, potatoes, and corn.The approximate cook time for different levels of doneness is 3-5 minutes for medium rare (135F), 5-7 minutes for medium (140F), and 7-10 minutes for medium well (150F). This will vary based on the thickness of the steak and the heat level. Use a thermometer for best results.