Goals in either half from Anthony Pilkington and Elliott Bennett gave the Canaries a 2-1 win against Spurs, who Lambert believes can still claim a Champions League placeNorwich City manager Paul Lambert hailed his side's 2-1 victory at White Hart Lane against Tottenham Hotspur as the best of his three years in charge at Carrow Road.
Since his arrival in Norfolk from Colchester in 2009, the Canaries have gone from the bottom of League One to the top half of the Premier League in just two-and-a-half years.
And the Scot was full of praise for his side's latest triumph, one which has seen them move into ninth place with 43 points from 33 matches.
"It's the best performance in the three years I've been here," said Lambert.
"That's the magnitude of it. I thought we were brilliant right from the off. It was a hard game up against a team going for Champions League football.
"I'm not going to turn around and say we should be beating Tottenham four or five. To win here was incredible for us. The best performance that I've seen for a while.
"We've been playing really well of late. The football we're playing is excellent and we've got a goal threat."
Norwich's goalscorers on Monday, Anthony Pilkington and Elliott Bennett, had never played above the third tier of English football prior to this season and Lambert was full of praise for the duo.
When asked about Pilkington, he responded: "He was excellent. Great delivery.
"He's another one, him and Bennett haven't even played Championship football. I'm delighted for them, proud as anything.
"It was an absolute bullet from Bennett. They're the ones that deserve a bit of praise. His work-rate is exceptional.
"The way he plays the game with enthusiasm and with the ability he's got. But it's unfair to single anyone out. Collectively we were absolutely brilliant.
"The lads have earned a right to make a name for themselves. We played Fulham a few weeks ago and had 622 passes and we got turned over.
"But we've been playing extremely well of late, it's really pleasing. We're a threat going forward, there's no doubt. The fans get right behind us."
Lambert also expressed his belief that Harry Redknapp's side can still secure a Champions League spot, despite a recent wobble in form.
"They're a really top side – they've got some brilliant, world-class players," continued the Scot.
"I think Champions League qualification will go right to the wire but Spurs are definitely a top side."
As for the future of his own side, Lambert, a former Champions League winner in his playing days with Borussia Dortmund, remains pragmatic.
He admitted that safety in itself is an achievement for the Canaries, given they were stranded in League One just two seasons ago.
"It's an incredible story what has happened here in the last three years," continued Lambert.
"I just want to be safe. We've won a game against an absolutely fabulous side. But I just want to survive.
"We'll try and finish strong and as high up as we can. We've beaten a top four side which is incredible for us.
"Two years ago, we couldn't spell 'Tottenham'. You need to sit back and analyse it.
"It's ridiculous what's happened here - a club that was just about to fold, and then you inherit a group of lads that might not be good enough to get out of League One and you start to change your team.
"You go on a run, get out of League One, and you've got to rebuild it for the Championship and go again.
"You've got to get lads in you think can compete in the Premiership. It's been three years and a lot of hard work.
"[Norwich assistant] Ian Culverhouse is huge for us, he's been brilliant for me – a major part of what's happened."