Soak the raisins and candied peels in the rum and set aside. Mix the flour with the xanthan gum if using, the yeast and the sugar. Melt 100g of the margarine and combine with the warmed milk and ground spices. Make a well in the flour and add the liquid. Mix then knead until you form a smooth dough

Knead in the almonds, rum raisin mix and grated lemon zest. Lightly oil a large bowl, put the dough in and cover with a tea towel. Leave to rise in a warm place until the dough has doubled in size, an hour or 2

Take the dough out and knead again well. Leave to rise again for a further 20 minutes if using wheat based flour

Divide the dough in two and knead each down into a rectangle. Make 2 sausage shapes from the marzipan and lie in the middle of each dough rectangle. Wrap the dough around the marzipan and form a loaf shape. Place on a baking sheet and let rise again for another hour. Bake at gas 4 / 180C / 350°F for 40 minutes or until ready

Brush the loaves with the the 30g of remaining melted margarine then dust with some icing/powdered sugar. Wait 15 minutes then liberally dust again

Will keep for 1 week in an airtight container