Bannan was restored to Wednesday's starting XI at the Riverside Stadium after a two-match man.
And the Scotland international, a reported Middlesbrough target before he signed a new Owls contract in August, was quick to make up for lost time.
It was his defence-splitting pass from which Adam Reach scored the game's only goal midway through the first half, before another almost led to a second for Steven Fletcher after half-time.
And the following Boro supporters - some through gritted teeth - were complimentary about Bannan's display...
Barry ******* Bannan just bossed #Boro. Barry Bannan.
We made Barry Bannan look like ******* Iniesta
Barry bannan has the best left foot in the league! Said it for years and he’s proved it today— Weller (@cals2204) December 26, 2018
Should be a premier league player. To good for this league— Lee William Endrödi (@leewillend) December 26, 2018
We’ve just made Barry Bannan look like prime Andrés Iniesta. #Boro— Chris Cassidy (@CCass6) December 26, 2018
Its a player like Bannan we lack although pulis would ruin him— bryan banks (@sknab1) December 26, 2018
Making Barry Bannan look like Paul Scholes #borolive— The Chicken Run (@ayresome_south) December 26, 2018
Barry Bannan showing our midfield how to play. #borolive— Nick Budrewicz (@NickBudrewicz) December 26, 2018
Sheffield Wednesday have now won back-to-back matches under caretaker manager Lee Bullen, having mutually parted with Jos Luhukay on Friday.
The Owls are expected to appoint Steve Bruce as the Dutchman's successor in the coming days.
Their latest result could put pressure on Middlesbrough boss Tony Pulis, whose side remain in the Championship's top six despite having won one of their last six fixtures.
How good was Bannan for Sheffield Wednesday?
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