Heat 1 tbsp oil in a large skillet over high; add ½ beef in a single layer + sear for 1 min; push steak to the side + repeat the process; sauté 1-2 min, stirring constantly until hot, season with salt/pep + fave seasonings

Spread beef evenly over one half of one tortilla, leaving a ½-inch border around the edges; top with 2-3 tbsp cheese + repeat with 2 more tortillas; fold tortillas in half, forming half-moon shapes

Heat a lightly oiled large skillet over med-high, add tortillas to skillet (in batches if needed) + cook 1-2 min per side until browned + cheese melts; cut into wedges + serve with salsa for dipping