using the form of a seder meal?
Although there have been demonstration Seders at a goodly number of Christian churches, the key word is “demonstration”. These are educational experiences, rather than observances. Note that there is no historical basis for the assumption the the Last Supper was a Seder. Note that the Seder states “We do this because of the Eternal One did for US, when he led us out of the land of Egypt.” The Seder can not be separated from Jewish peoplehood.