I Can't Believe It's Not Butter Spray
Spray each side of both slices with I Can't Believe It's Not Butter.
Toast the bread in a skillet. An Iron skillet is wonderful for this, but any skillet will work.
Note: Traditionally the Miracle Whip would have been mixed into the tuna, like a tuna salad, before making the sandwhich. To my mouth, however, the tuna robs the miracle whip of its creamy texture, so I prefer to spread it on the bread so I can actually taste it and feel it on my tongue when I'm eating it.