Fresh Gingerbread with Lemon Icing

Having run the cake stall at my daughter’s school last year, I can say that there are two types of optimum fête-fare: small, individual pieces that look cute and fetch high unit-prices and tray-bakes that can be made without effort or dexterity and sliced up easily. This recipe fits the latter category and has the added virtue of appealing to parents and grandparents who feel that something from the cake stall should be gratifyingly old-fashioned. The fresh ginger is a modern touch, admitte