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; add half a cup of cheese + cook 1-2 min more, breaking up beef with a spatula

Divide filling to 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 enchilada sauce for dipping