Mr Majeika and the Dinner Lady (Young Puffin Books)

'Sometimes,' whispered Jody. 'I think school dinners would be alright if it wasn't for her.' Mrs. Chipchase, the nasty dinner lady, makes lunch hour at St. Barty's really unpleasant. That is, for everyone but her 'favourite friend', Hamish Bigmore. Up to his usual tricks, Hamish is allowed to eat chocolate instead of ghastly school dinners! Mr. Majeika decides it's time to sort out the menu...