The game was halted as a result of flares set off by home supporters, with the delay lasting for around a minute.
Play was eventually able to resume after the smoke had dissipated.
Tottenham took the lead in the 23rd minute, with Pape Matar Sarr finding the net.
Tottenham 's Europa League game away to Ferencvaros was delayed due to poor visibility
There was a fervent atmosphere inside the Groupama Arena in Budapest as Tottenham continued their Europa League campaign.
Ange Postecoglou's side had won 3-0 at home to Qarabag in their opening game in the competition.
Tottenham's next Europa League game is at home to AZ Alkmaar on October 24.