Remove the steak from the fridge 30 to 40 minutes before cooking
Remove the steak from the marinade and discard the marinade
Salt and pepper both sides of the streak
Place your skillet over medium-high heat and let heat, add one tablespoon vegetable oil and let heat for 2 to 3 minutes
Place your steak in the pan and do not overlap
Cook for 4 minutes and turn
Cook for an additional 3 minutes for medium-rare and 5 minutes for medium
If you have a meat thermometer remove your steak at 127 degrees to 130 degrees for medium-rare and 137 degrees to 140 degrees for medium
Remove your steak to a cutting board and let rest while you cook the onions
In the same skillet add your onions and peppers, with the marinade, sprinkle with salt and pepper stir well, and let cook for about 5 to 8 minutes stirring occasionally
when the peppers have blistered and the onions have started to caramelize they are done, and can be removed to a serving plate
Make sure to let your steak rest for at least five minutes before you cut it. Do not cover it as this will steam it and cause your steak to overcook and turn gray. Slice the steak into strips making sure to go against the grain, and add to the serving plate with the onions and peppers
Now its time to serve with the sides you have chosen