Boothroyd told 'Sky Sports': ''To win it three times in a row is a really good feeling. We're preparing the team for Euro 2019 and we still have to qualify, with difficult games to come, but we've really enjoyed the tournament here.''
The England U21 side were a goal down within the opening few minutes of their clash against Mexico in the final, but came from behind to storm to a 2-1 victory. He said: ''It's been really good for us and a brilliant experience for our younger players.''
''Mexico are a very good team and we knew we'd have to be at our best to beat them. The turning point was during the first drinks break where we changed our formation and managed to score two goals quickly.''
''The game lasts 80-plus minutes and we knew in the last game against Mexico we finished the stronger team, so we thought we could wear them down. But they were very, very good. It was a tough game for us and a game we're pleased to win, obviously.''
''We think of ourselves as a team, no individuals, that is our biggest strength. The biggest plus is we've managed to teach our players a new system, very similar to our senior team, as we want it to be seamless for those guys that go through to the first team.''
Boothroyd concluded: "They've taken a lot of information on and done really, really well so we're very happy."