"...and show to WATCH TOWER SOCIETY the real christian Passover!"
You mean the WTBTS's "black memorial" devised by the marginalised Charles Taze Russell?
It was called the "Lord's evening meal" or "last supper" for a pretty obvious reason.
1 Corinthians 11:21 confirms that Christ's memorial wasn't just a nibble of dry bread and a sip of wine; "For when you eat it, each one takes his own evening meal beforehand...."