Kristall and Blank lifted the trophy after a stellar season in which they led Oakwood A to the Premier Division title.
"It is a shame there's no league-wide evening but I do understand the reasons for it," Blank told JC Sport.
"We had a really nice evening at Rowley with David Wolff, Nigel Burns and guest of honour Nick Sonenfield.
"It was fantastic getting to meet Nick and hear the history behind Oakwood - and see his club tie. Something to aspire to."
Oakwood pipped Redbridge Jewish Care A to the crown after the east Londoners slipped to defeat in their final match of the season against Hendon United.
And Blank described the accolade as a "fairytale ending" following a lengthy spell with the club, first as a player and then manager.
“For me to go out with title and be awarded joint manager of the year as my final act - it really is a fairytale ending for me," he added.
"It's set me up brilliantly for the summer. Believe it or not we are already planning next season - I think we're going to be even stronger."
Avi Garson of Faithfold B is the league's Young Player of the Year, while James Harpin, who led Maccabi London Lions B to the runners-up spot in Division One, received the Safe Hands awards for best goalkeeper.
All of this season's award winners will be confirmed in early June.