Heat a skillet over medium heat
Place a tortilla in the skillet
Sprinkle shredded cheese over half of the tortilla
Add optional fillings such as cooked chicken, beans, vegetables, or salsa
Fold the tortilla in half
Cook until the bottom is golden brown
Flip carefully and cook the other side until golden brown and the cheese is melted
Remove from the skillet
Let it cool briefly
Cut into wedges and serve