Tuna Melt

This is my second tuna melt of the day AND my second tuna melt of all time!  I have turned over a new leaf, and there is a tuna melt under it.  Now I would like to repeat "tuna melt" three times---tuna melt, tuna melt, tuna melt---for it is through repetition that we come to understand the nature of bliss. 

 
Or just how to make a really killer tuna melt.  Here's the universal secret for bliss:

Start with excellent ingredients, and treat them excellently.  You cannot go wrong.