Drain the cherries, catching the juice. Mix 6 tablespoons of juice and the starch until smooth. Bring the rest of the juice, 60 g sugar, 5 tablespoons rum and lemon zest to the boil. Stir in the starch and simmer for about 1 minute. Remove the lemon peel. Fold in the cherries and let them cool.
Drain the pineapple while collecting the juice. Cut 1 pineapple ring into pieces. Quarter the remaining rings, drizzle with the rest of the rum.
Roast the desiccated coconut, leave to cool. Mix the quark, 125 g sugar, vanilla sugar and approx. 200 ml pineapple juice until creamy. Whip the cream until stiff, fold in.
Layer the quark cream, cherries and pineapple quarters in a glass bowl. Put some cherry compote on top. Sprinkle with pineapple pieces and desiccated coconut. Put in a cool place.