Mix the mustard and mayonnaise together and spread on one side of each slice of bread.
Put 1 slice of ham on each piece of bread, folded.
Break apart a slice of the cheese, and put half on the ham, then top with more ham. The pieces of cheese are large, so don't worry about being skimpy.
Have ready a good cast iron or stainless steel skillet. Heat the skillet on medium.
Put 2 of the pieces of butte that you cut, let it melt, then put the sandwich on the butter.
Reduce the flame to low immediately and cook, covered, for about 3 to 4 minutes, or until the bread has browned. Turn over and cook an additional 2 to 3 minutes.
Remove from the heat, cut and serve.
These are excellent with a pickle.
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