Place the steaks between sheets of wax paper, then pound until each steak is about ¼ inch thick.
Place the pounded steaks in a zip lock plastic bag. Add the mustard, oregano, cumin, garlic, cilantro, salt and pepper. Refrigerate for 1 hour or overnight. Be sure the steaks are evenly covered.
In a large skillet, heat the olive oil over medium heat. Place the steaks into the skillet and cook for 3 minutes per side.
To serve: Pour hogao over the steaks and top with a fried egg.