DO-AHEAD TIP: Marinate steak overnight or for at least 4 hours (see recipe).
Place steak in a large zipper-topped plastic bag.
In a medium bowl, whisk together remaining ingredients (olive oil through jalapeno pepper).
Pour mixture over steak. Seal the bag and turn to coat. Refrigerate overnight or for at least 4 hours, turning occasionally.
At the time of cooking, preheat grill to MEDIUM-HIGH. Remove steak from marinade.
Grill for 4 to 6 minutes per side or until cooked to the desired level of doneness.
Allow steak to rest for 10 minutes then thinly slice against the grain (diagonally). Serve and enjoy!