No photos, but ended up at Marie Callender's the other night (don't ask!). As I had a head cold I ordered a tuna melt (when I have congestion I crave tuna; yes, it makes no sense). Received one of the most disappointing tuna melts I've ever been served: it was refrigerator-cold!
All the components were right: grilled cheese bread with cheese melted on the inside, sliced tomatoes, and a goodly amount of tuna salad. It was freshly made - not at all soggy - and so very damn cold! Best guess is that the bread had been grilled and the cheese melted on it earlier and everything was slapped together right from the fridge.
Server disappeared and manager was absent, so I ended up boxing up the sandwich and bringing it home because I was so disappointed I lost my appetite.
Oddly, it made a tasty meal the next day. I ate it cold.
(Btw, they offer tater tots as a side - those were served piping hot.)