‘And they gave him a piece of a broiled fish. And he took it, and ate before them.'
And in response to His request they gave Him a piece of broiled fish from the meal that they were enjoying and He ate it in front of them. Once again they were partaking in a fellowship meal with their Master. This was also possibly an indication that His special fasting could be seen as over because the Kingly Rule of God was now being ‘fulfilled' by His presence with them as their risen Lord (Luke 22:16).
So Luke's Gospel had begun with Jesus 1) being welcomed into the world by the faithful in the Temple in Jerusalem, awaiting the Kingly Rule of God 2) being proclaimed as the Son of the Most High, 3) being in conflict with Satan in the wilderness. And it has now ended with, in reverse order, 3) His seeming defeat by Satan in being sent to His death on the cross (Luke 22:3), which has been turned into a victory, 2) the revelation of Himself as the One who has conquered death and ascended to His Father (Luke 24:36-51), and 1) Himself as the One Whose faithful followers are worshipping in the Temple in Jerusalem, ready for the advancement of the Kingly Rule of God from Jerusalem to Rome (Luke 24:52-53 with Acts 1:8).