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The full-back, 19, netted the opener in a comfortable 2-0 victory to help keep Celtic two points clear at the top.
The Ghanaian-born has played 10 games for Celtic since signing from Manchester City in September on a four-year deal.
"I don't want to big him up too much but everyone is seeing it with their own eyes," manager Lennon said.
"His level of performance is outstanding. He has pace, power, end product and he gets a goal today as well. So he's been magnificent since he came in the door."
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Celtic's win over Hibs - their eighth in a row in the league - featured a number of key players that were rested for the club's final Europa League group stage game against Cluj on Thursday.
However, the Scottish champions had to contend without in-form midfielder Ryan Christie as well as Jonny Hayes and Mohamed Elyounoussi.
Lennon doesn't expect the latter two to return before Wednesday's league game with Hearts, but the Celtic manager does hope to have Christie back.