In a gallon sized freezer bag, combine all of the ingredients EXCEPT the flank or skirt steak.
Add steak to the bag and seal. Knead the steak in the bag to coat well with the marinade. Place in the fridge for 6 -24 hours turning occasionally.
Grilled on an oiled grilled over medium heat for 6-9 minutes per side until desired doneness (for medium rare - 145 degrees, for medium - 160 degrees, and well done 170 degrees) Keep in mind you want to pull it off the grill 5-10 degrees before desired doneness. The meat will cook a little more while it rests.
Allow steak to rest for 5 minutes. Slice thinly across the grain. Serves 8.