Remove crusts from bread slices. Use a rolling pin to flatten each slice until thin.

Place one slice of cheese near one edge of each bread slice. Add optional fillings if using.

Roll bread tightly around the cheese, sealing the edge gently.

Lightly butter the outside of each roll-up.

Heat a skillet over medium heat. Place roll-ups seam-side down and cook until golden.

Rotate roll-ups to brown all sides evenly until cheese is melted.

Remove from heat and serve warm.