Drain the pineapple and cut into fine pieces. Pour sugar into the cup. Fill to the brim with ground almonds. Put into a bowl. Mix flour, starch, baking powder and vanillin sugar in it.
Stir in eggs, butter and coconut milk with the whisk of the hand mixer. Fold in pineapple. Pour the dough into a greased box form (2 litres capacity; 30 cm length) sprinkled with breadcrumbs. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for about 1 hour. Then let it rest in the form for 10 minutes, turn out of the form and let it cool down completely. Cut through 2 x horizontally and sprinkle with coconut liqueur. Spread the lower and middle base with jam and put back together again. Stir icing sugar, rum and lemon juice until smooth. Cover the cake with it.
Cut through 2 x horizontally and sprinkle with coconut liqueur. Spread the lower and middle base with jam and put back together again. Stir icing sugar, rum and lemon juice until smooth. Cover the cake with it. Immediately sprinkle all around with coconut chips. Decorate with candied pineapple pieces