Was there recently and had almost the same as you guys. I ordered the burger & lamb since I didn't find any of the starters appealing. The lamb was prepared perfectly (medium rare) and I thought it was pretty good.
Haven't been to MIA's FD in a very long time--maybe 5 years ago--and was on, if I recall, an MIA to LHR flight. Is it that much better? Only the int'l routes have access to MIA FD or, like JFK, TCONs?
PS - Ordered my burger medium and it came well done with not much cheese. So, while the lamb was fine, the burger this time was disappointing. To be fair, there were many times when the burger was cooked perfectly and very good.