Reduce the heat in skillet to medium low and add more Greek Oregano & Garlic Olive Oil to once again coat the bottom of the pan. Place 4 slices of sourdough bread in skillet and distribute shredded jack cheese evenly among the 4 slices. Slowly cook until cheese is melted while keeping a close eye so as not to burn the bread.
While the cheese melts, add the caramelized onions on top of the cheese on 2 slices. Add the curtido to the other 2 slices and sprinkle with freshly ground pepper and the smoked salt. Put the 2 halves of each sandwich together to make 2 sandwiches. Enjoy!