Melt 2 Tablespoons of butter.
Brush the butter onto one side of each slice of bread.
Heat a saute pan under low heat.
Place both slices of bread, butter side down, into the pan.
Divide the 1/4 cup of grated cheese between the 2 slices of bread evenly.
Cook the bread until it's toasted to golden brown and the cheese has melted.
Remove the bread slices from the pan.
Divide the 1/3 cup (more if desired) chicken salad between both slices evenly.
Place lettuce and tomato on one slice of bread on top of the chicken salad, top with the other slice of bread.
Cut in half to serve.