Peel and quarter the pineapple, cut out the hard center core, and cut the flesh into small pieces.
Put the 500 g quark in a bowl and stir for 2 minutes until smooth. Add the 2 cl coconut liqueur, juice of 1 lemon, and 1 tablespoon sugar. Mix in the 3 tablespoons desiccated coconut and pineapple pieces.
In another bowl, beat the 2 egg whites, gradually adding the 10 grams sugar, until stiff peaks form (about 5 minutes). Fold gently into the quark mixture along with the 2 tablespoons whipped cream. Divide into 4 portion bowls.
Refrigerate for at least 1 hour until well chilled. Serve garnished with small pineapple pieces and leaves if desired.