In a medium bowl mix together soy sauce, lime juice, brown sugar, liquid smoke and minced garlic.
Place the steak in an airtight container or zip top baggie pour the marinade mixture over top of the meat.
Place in the refrigerator to marinade at least 8 hours.
When you are ready to cook-
Place the salt, cumin, chili powder, onion powder, and garlic powder in a small bowl and stir together.
Remove the meat from the marinade and rub down both sides with the spice mixture.
Heat up your grill, griddle or cast iron skillet to high. Oil the grill or skillet to prevent the meat from sticking.
Cook the meat on high for 3-5 minutes on each side or until the internal temperature reaches 130-140