Preheat the skillet: Heat a skillet or griddle over medium heat. You want it hot enough to melt the cheese inside without burning the bread.
Cook the sandwiches: Place the sandwiches in the preheated skillet. Cook for about 3-4 minutes on each side, or until the bread is golden brown and crispy, and the cheese inside is melted and bubbly.
Add some heat (optional): If you like a bit of spice, sprinkle a pinch of crushed red pepper flakes over the cheese before you close the sandwich. This will add a subtle kick