01 - Preheat a large skillet or griddle over medium heat.
02 - Place one tortilla on a clean surface. Sprinkle about 3/4 cup shredded cheese evenly over half of the tortilla, then add your choice of optional fillings. Fold the tortilla over to create a half-moon shape.
03 - Place the filled tortilla onto the hot skillet. Cook for 2-3 minutes per side, pressing gently, until the tortilla is golden brown and the cheese is melted.
04 - Remove from heat and transfer to a cutting board. Let cool briefly, then cut into wedges.
05 - Repeat with remaining tortillas and fillings.
06 - Serve immediately with sour cream, salsa, guacamole, and fresh cilantro.