Mix the marinade ingredients together in a shallow glass dish, then put the steak in and move it around until it is well coated. Cover the dish and refrigerate a couple of hours. Pull the steak out of the refrigerator when you start to make the salsa.
Combine all the salsa ingredients together in a small bowl.
Heat a cast iron skillet on the stove and cook until done to your liking. You may need to cut the steak in half to fit in your pan. Slice into strips then cut the strips into smaller pieces, about 1/2".
Clean out the skillet and heat corn tortillas in it.