Marsupial Surprise was a popular dish prepared by Neelix when USS Voyager docked at the Markonian outpost in 2376, and had opened its doors, allowing free access to the ship for anyone on the space station.
Neelix, who only had two kilos of pouches in stock, ran out of the foodstuff sooner than expected, and disappointed many of the crew and visitors alike. As a number of people walked away, he tried to win them back by suggesting they perhaps try the pizza. (VOY: "Survival Instinct")