This is a great recipe for an electric griddle. If you have one, set heat to low. If not, you can use a heavy frying pan on medium-low heat on the stove.
Butter side one of four pieces of bread with soft butter to cover completely. Place buttered side down on griddle. Lightly butter the second side of bread facing up on griddle. Place 1 slice of cheese over buttered bread; then place ham on cheese slice. Add one more slice of cheese on ham, and cover with tomato slice if using. Butter remaining 4 slices of bread on both sides and place one slice buttered bread down on each sandwich.
With a spatula, press down gently to set the sandwich. Cook until medium brown, this could take as long as 20 minutes. Then flip over and brown other side. The taste of this sandwich is really ''toasty" and crisp. So delicious. Makes 4 servings. Enjoy!
Note: The sandwiches are best when cooked "low and slow," because they heat evenly all the way to the middle and the outside doesn't burn.