2 Slices Bread
1 Slice American Cheese (or other meltable)
1 Tbsp Butter or Margarine
Your favorite brand of tomato soup (heated)
Use a pan (or pancake griddle) that will fit the 2 slices bread. Put on low to med heat. You want to have enough butter to coat the bottom, so the entire bread surface gets crisped. When the butter is melted, put the bread in the pan. Put the cheese down on one slice of bread. Some people like to wait until the bread is cooked, flipping it once, and then putting down the cheese.
Either way, keep checking the bottom of the bread with a spatula so it doesn’t completely burn. When cheese is sufficiently melted, and bread sufficiently toasted flip the piece of bread w/out the cheese onto the other one. Take it out of pan, cut it if desired, and enjoy.