1. Cut steak into 1 inch cubes and set aside.
2. Juice lemons into a bowl, add all remaining ingredients and mix well.
3. Add steak to marinade, cover and refrigerate over night or a minimum of 4 hours.
4. Remove steak from fridge 30 minutes prior to eating and place on skewers.
5. Preheat barbeque to medium-high and grill to desired doneness.