Picadas are traditionally made of beef, pork or chicken.
Some states add beans to the tortilla before adding the meat on top, tastes great either way.
Once the meet is cooked, let it cool and then shred it. In the meantime, make small, thick tortillas. Cook them on a comal or a dry frying pan. Be sure to build up the edges of the tortillas since they will be holding the meat and salsa. When the tortillas are cooked, add the meat, salsa or mole.