Step by step:
heat pan, then turn it down to low-med.
put butter in pan.
add sandwich, rub it around in the melty butter.
cover. wait 1 minute. check inside for melt, bottom for color. 30 more seconds if needed.
remove sandwich, add butter, flip sandwich back into pan, rub around in melty butter.
cover. wait 30 sec. to 1 min.
microwave a small bowl of tomato sauce, 1 min. stir. 30 sec. use hotpad to remove.