The Autobots wouldn't be anywhere near as hard if their robotic exteriors concealed soft potato centres. Although at least it'd give the Decepticons scope for sundry 'You've had your chips, Optimus Prime..' taunts. So far, however, there hasn't been a Transformers / potato crossover of note.
Until now. Optimash Prime is, as his name implies, a Mr Potato Head toy in Optimus Prime's clothing. So you can mix and match OP's face mask, boots, truck breastplate and robo-arms, and there's a mini truck thrown in for free.
A bargain for £9.95. Transformers: robots dressed as fries. Sorry.