Preheat the oven to 150°C/300°F/Gas 2 and line a 20cm (8in) cake tin with baking parchment. Cream together the butter and sugar until light and fluffy. Beat in the eggs one at a time, adding a spoonful of the flour along with each egg. Sift in the remaining flour, baking powder and spice and fold the almonds, dried fruit and lemon zest and juice into the mixture. Spoon half into the cake tin and smooth the surface level Roll out one third of the marzipan until it’s a circle, just smaller than the cake tin, and lay it on top of the mixture in the tin. Spoon the remaining mixture over the top and level the surface. Bake the cake in the centre of the oven for 2–2¼ hours, or until a skewer comes out clean after being inserted into the cake. Cover with a sheet of baking parchment if it starts to brown. When cooked, remove the cake from the oven and leave to cool. Remove the cake from the tin and peel away the lining paper. Spread the apricot glaze or jam over the top. Roll out half of the remaining marzipan to fit the top of the cake. Place it on the cake and smooth down, taking care not to trap any air pockets underneath. Pinch around the edges. Divide the remaining marzipan into 11 pieces and roll each into a ball. Brush a little apricot glaze or jam onto the base of each and evenly space around the top of the cake. Place under a hot grill to brown the marzipan lightly. Remove from the grill and leave to cool before serving.