Place all ingredients except the steak in a gallon sized ziptop bag and mix them. Next, place the steak in the bag, let out most of the air and seal the bag. Massage the marinade and meat to make sure the steak is completely coated. Place the bag in the fridge overnight.
Brush or spray the grill grates with canola or olive oil. Heat the grill to high heat - 500-700°F.
Place the steak on the hottest part of the grill. Cook using the follow guide for your desired doneness:
Medium-rare: 3 to 5 minutes (internal temperature of 135° F)
Medium: 5 to 7 minutes for (internal temperature of 140° F)
Medium-well: 8 to 10 minutes for (internal temperature of 150° F)
Let the steak rest for 5 minutes before slicing.
Add all ingredients to a mixing bowl and whisk together. For best flavor, make 1 hour ahead of time and let it chill in the fridge for 1 hour.
Divide the tortillas into 12 stacks of 2 tortillas. Corn tortillas tear easily so they need to be doubled up.
Heat each doubled tortilla on the grill, about 2 minutes per side.
Place some of the sliced steak on the doubled tortilla and add the toppings of your choice.