Put sugar, 2 tablespoons of water and nuts in a small pan and caramelise over medium heat until golden brown. Spread on a piece of baking paper and let it cool down.
In the meantime, wash the parsley, shake dry and chop finely, except for a few leaves for garnishing. Mix vinegar and chopped parsley. Fold in a thin stream of oil, season with salt and pepper.
Clean, peel and quarter the pineapple and cut out the stalk. Cut the flesh into thin slices. Peel and wash the beetroot and also cut or slice it thinly. Drain mozzarella.
Arrange pineapple and beetroot alternately on plates in a fan shape. Arrange mozzarella and walnuts on top. Drizzle vinaigrette over it. Garnish with ground pepper and remaining parsley.