Wash the pineapple, papaya, and mango thoroughly. Peel the pineapple, remove the hard core, and cut the flesh into bite-sized pieces. Peel and deseed the papaya and cut it into pieces as well. Peel the mangoes and dice the flesh.
Wash the lime thoroughly, squeeze out the juice, and finely grate some of the zest. The lime juice adds a refreshing acidity, and the zest adds a slightly more intense citrus flavor.
Place the prepared fruit in a large bowl. Pour the lime juice and grated lime zest over the fruit.
Mix everything together well so that the lime juice and flavors are evenly distributed. Cover the fruit salad and let it chill in the refrigerator for at least half an hour to allow the flavors to develop.
The salad can be garnished with a few fresh mint leaves, which gives it a fresh note not only visually, but also in terms of taste.