Place the steak and all remaining ingredients in a plastic zippered bag. Zip it up and let it sit in the fridge for 2 to 3 hours.
When you are ready to cook, turn the grill on high and let it heat up for 10 minutes. Pop the steak on the grill (discard the marinade) and cook for 4 to 5 minutes per side for medium rare depending on the size of your steak (if you are using a meat thermometer, you are looking for 140 degrees).
Let the steak rest under foil for 5 minutes, then slice it up against the grain and serve!
Notes
Steak: You want a nice sturdy steak that will stand up to being marinated. Flank steak, flap steak and hangar steaks are all great choices.
Rum: You can use either light or dark rum for this recipe.
Soy Sauce: As always, we recommend low sodium soy sauce for this recipe. You can always add salt later, but it’s hard to take out. ☺️