The Cheesy Tuna

                                                                                      Hack Your Sub

You could consider this the polar opposite of the Tuna Extreme. Take a six-inch bun and ask for a tuna sandwich. But instead of spreading it on one side of the split bun. ask for it to be spread on each side. Normally, it's two scoops of tuna per sub. So, ask for it to be spread one each side of the bun, one scoop per side. Now put the two slices of cheese in between the bun. Close it and have it toasted.
What you're gonna get is a six inch sub with tuna and melted cheese. The melted cheese should have bound the split bun together again. Don't open it to add vegetables because there is none needed. Also no condiments and sauces.
I saw this done by another customer in front of me. Interesting, I thought.  The customer was charged RM 7.50 even though it wasn't a Tuesday. I think the staff were too stunned to figure out how to charge it because of the non-standard selection. Your mileage may vary.
My hack on it would be to add either pickles or jalapenos together with the cheese. Or maybe a dash of pepper. They would get 'glued' together with the cheese and tuna.