Brown bread (none of that thin stuff, it must have body)
Spread the butter as you wish (but not too little,)
Add the tuna (basic stuff I know)
Sprinkle (sparingly) the olive oil over the tuna (and fold,)
This with a cup of strong black coffee is simple yet oh so mmmm! Mama mia!
For my sense there are subtle cross overs with each flavour; the pure brown bread oozes its wheaty aroma, the butter dances around the tuna and the olive oil creates a much desired texture of the whole snack.