Symbolically, Judas missing the wine is significant.
Difficult to say what the meal was like. Typically, and as around Passover (although the mass slaughter of lambs had not happened yet), they would have eaten bean stew, lamb, olives, bitter herbs, a fish sauce, unleavened bread, dates and aromatised wine.
There's been a popular view as studies of the Jewish character of the early church increase, that the Last Supper be seen as a Jewish Seder. Scholars regard this as anachronistic. Although it was a meal at Passover, it would have followed Second Temple Period custom. The earliest elements in the current Passover Seder are not mentioned until the ninth century.
Some Jesus Seminar scholars apparently believed the Lord's supper to have derived not from any actual event but rather was a gentile memorial practice. Bart Ehrman likewise questions the institution of the Eucharist do not appear in certain ancient manuscripts and might not have been originally in the text, however the earliest source, P75, dating from the 2nd century, does include it.
