Cook for 1-2 minutes on each side until golden brown and crispy.
Cut into wedges with a pizza cutter or knife.
Fold the tortilla in half to cover the filling.
If desired, spread a tablespoon of salsa on the other side.
Let the cheese melt for about 2 minutes.
Melt the butter in a large skillet over medium heat.
Place a tortilla in the skillet.
Remove from the skillet and place on a cutting board.
Serve warm with salsa or sour cream for dipping.
Sprinkle half the shredded cheese on one side of the tortilla.