Biscuit of the month: Shortbread biscuits with pineapple jam

These Puerto Rican shortbread biscuits are a favourite at parties and celebrations, including Christmas, and are often given as gifts. Simple to make, but impossible to resist, there are endless variations on the centre filling – the ubiquitous guava jam or hundreds and thousands are both popular in Puerto Rico – but we’ve filled ours with a homemade pineapple jam that tastes like summer.