In a large glass bowl, combine the first 8 ingredients (tamari through black pepper) and stir to combine. Pour marinade over steak and let sit for at least 30 minutes, up to overnight, in the fridge. I like to put the steak into a sealable bag and pour the marinade in, shake it up and let sit.
When ready to cook your steak, preheat your grill to 400F. Cook steak, flipping halfway, until an internal thermometer reads 135F for medium-rare. The length of time will depend on the cut of steak you choose and how thick the steak is. Generally speaking, I recommend 5 minutes per side per inch of steak. But you'll have to watch the steak closely and monitor the temperature to ensure it's cooked to your liking.