Put all the ingredients except the flour and bicarb in a pan and heat until melted. Sift the flour and bicarb into a bowl, then stir in the wet ingredients to form a soft dough. Bring together with your hands into a disc, wrap in cling film and chill for 30 mins.
Dust a board, then thinly roll out dough. Lightly oil a baking sheet, stamp out 24 x 6cm circles and place on the sheet.
Bake for 10-15 mins until golden and firm to the touch. Leave on the tray for 5 mins, then transfer to a cooling rack and allow to cool completely before serving.
