Michail Antonio scored twice and Declan Rice hit a superb solo goal as West Ham marched into the semi-finals of the Europa Conference League.
The Hammers fell a goal behind to Belgian side Gent but hit back for a thumping 4-1 win on the night and 5-2 on aggregate.
It means a continental semi-final for a second consecutive year for David Moyes' side, having reached the same stage of the Europa League last term.
Moyes picked arguably his strongest available side, having managed to create a little breathing space between themselves and the Premier League's bottom three.
But Gent should have scored with their first attack - Sven Kuma produced a dangerous cross which Gift Orban and Hugo Cuypers both missed in front of goal.
FULL MATCH DETAILS
West Ham went close when Kurt Zouma headed over from a Vladimir Coufal free-kick, before there were lengthy delays when Coufal and Nayef Aguerd needed treatment on head injuries.
But it was Lucas Paqueta who looked like he had taken a bang on the head when his lazy pass in the centre was easily intercepted.
Orban was able to charge forward and square to Matisse Samoise, unmarked on the right. His first-time shot bounced into the ground and looped up for Cuypers to bundle home despite the best efforts of Aguerd on the goal-line.
But West Ham equalised before half-time when Antonio powerfully met Jarrod Bowen's free-kick at the near post.
Moyes was adamant West Ham should have had a penalty when Said Benrahma's header struck the arm of Samoise but referee Orel Grinfeeld gave nothing.
The hosts should have gone ahead four minutes into the second half when Bowen rolled the ball across goal for the onrushing Tomas Soucek, who caught his shot well but crashed it against the crossbar.
There then came a
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