A hat-trick from Thiago ensured that the dominant winners stormed into the lead despite goals early on and late in the game from the runners-up in Israel.
Isco, who is the player of the tournament for his performances throughout the event including grabbing a goal in the second half of the final, admitted he was surprised at how strong his team were en route to another Under-21 title.
"The most important thing is to win the championship. It's a wonder how strong we have been in this tournament. We are very happy," AS quote the attacker as saying.
The 21-year-old also clarified who the team's primary penalty-taker was after Thiago was given the duty to complete his hat-trick in the opening 45.
"It was agreed from the start of the competition that we would each take a penalty if we got two in a game," he added.
Meanwhile, final hero Thiago - who was also present for his country's last success in this competition two years ago - was quick to share the plaudits with his team-mates and expressed satisfaction having won the tournament the tika taka way."Our success comes from the goals of [Alvaro] Morata, Isco and Alvaro Vazquez who have all lead us to winning this tournament again," said the Barcelona youngster.
"The most important thing is to show the world tika taka football."