1Lay out the 8 slices of whole wheat bread on a clean surface.
Spread 1/2 tablespoon of light butter evenly on one side of each bread slice.
Place 4 slices of bread, buttered side down, on a skillet or griddle.
Top each slice with 1 slice of reduced-fat cheddar cheese.
Arrange tomato slices evenly over the cheese on each sandwich.
Cover each with the remaining bread slices, buttered side up.
Heat the skillet or griddle over medium heat.
Cook the sandwiches for 3-4 minutes on one side, until golden brown.
Carefully flip each sandwich and cook for another 2-3 minutes, until the other side is golden and the cheese is melted.
Remove from the skillet, let cool slightly, slice in half, and serve warm.