Mitchell shut out the relatively unknown Frenchman, taking all eight rounds in the fight, to improve his record to 34-2.
Mitchell had been out of action since losing in four rounds to WBO lightweight champion Ricky Burns in Glasgow last August.
Mitchell was fighting on the same card has the third ever light-welterweights Prizefighter competition.
That event was won by Welshman Chris Jenkins who recorded points wins over Tony Owen and Eren Arif before stopping Danny Connor in the second round of the final.
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