Goals from Lassad, Mikael Lustig, Gary Hooper and a Ryan Stevenson own goal secured the 100th victory of the Irishman's time in charge of the Hoops.
And after his altercation with fans after the 1-0 home defeat to Inverness last Saturday, Lennon insisted it was the perfect riposte from his charges.
"I got what I wanted from the team tonight," he said. "They were sensational.
"The first half was the exact opposite of Saturday. That's the reaction I was looking for and now I just want consistency.
"Hooper looked back to his best and Lassad came into the team and did a good job too. Again the back four were great and the goalkeeper was simply wonderful.
"That win gives us a cushion at the top with a game in hand so we are moving in the right direction again.
"Results at home we must improve on but our away form has been fantastic and that was another fantastic performance from the team."