Gather bread, cheese slices, and optional butter or spread
Lay out two slices of bread
Spread butter or your preferred spread on one side of each slice, if desired
Place cheese slices on the unspread side of one slice of bread
Add any optional fillings if desired
Close the sandwich with the second slice of bread, spread side facing out
Press the sandwich gently together
Serve as is, or toast in a pan or sandwich maker if desired