Lemon Ginger Shortbread

For many years we spent New Year with friends in Scotland. After the clock had struck twelve we used to wrap up and set out to first-foot in the few neighbouring cottages under the moor. At each cottage we were offered a piece of Black bun and some shortbread, which were often helped down with a home-brewed and extremely potent liqueur. In Scotland, it is traditional to have shortbread in the house to offer to friends throughout the festive season. You must hide this away in a tin or it wil