Preheat the oven to 425˚F. Line a baking sheet with parchment paper.
If using refrigerated carne asada steak, shred it into bite-size pieces, add some olive oil to a skillet and grill over medium heat for 2 minutes.
Lay the tortillas on the baking sheet with parchment paper, spread ½ of the carne asada mixture over half of each tortilla, and top with half of the cheese, half of the fresh cilantro and half of the chili slices. Leave about a ½ inch border at the edge.
Fold the tortillas pressing down to compact and brush them with some olive oil. Flip and brush oil on the other side.
Bake for 10 minutes until the quesadillas are slightly browned. Flip and bake for an extra 5 minutes.
Transfer to a cooling rack and let rest for 5 minutes, with a sharp knife or pizza cutter, cut into wedges and serve with salsa and sour cream.
Notes
For the meat, use well-seasoned marinated steak cut into thin slices.Pan-fry the beef in olive oil until browned before adding it to the tortilla.Bake until the tortillas are golden brown and crispy.