and mix in the butter until it has completely melted.
then, beat in the egg and half of the orange zest, making sure that the liquid is still warm for the next step.
add the strong flour, yeast, salt, half of the zest, and sugar into a large bowl; mix to combine. then add the warm liquid into the bowl, and stir using a spoon (or mix with your hands), until a soft dough forms.
oil a large bowl, add the dough, and cover with cling film. leave to stand for 60 minutes in a warm place until the dough has risen and doubled in size.
meanwhile, add the raisins to a small pan 