Hope Lake Country

Jesus chose to give the first "Lord’s Supper" at a Passover meal with his disciples. But this wasn't an ordinary Passover meal. First, the traditional main course, lamb, was not served. Only bread and wine are mentioned to have been present. And second, it was customary to celebrate the Passover meal with your family. So why did Jesus pull his disciples away of their families for this Passover, and why didn't he serve the usual main course?