Albert Barnes on Luke 24:30

Sat at meat. Reclined at the table, or while he was at supper.

He took bread and blessed it, &c. This was the office of the master of a feast, and perhaps this first attracted particularly their attention. Though he was in their house, yet he acted as master of the feast, as he used to do with them before his death. Perhaps, also, as he gave them the bread, they observed the prints in his hands, and they knew that it was Jesus. This was not a sacramental, but a common supper; yet our Saviour sought a blessing on the food, and thus set an example to all his followers to acknowledge God in their daily gifts, and to seek his benediction in all their enjoyments.

(2) "vanished" or, "ceased to be seen of them"