For the fruit salad with Campari, fillet the grapefruit and 2 oranges: Peel off the peel including the white inner skin, collecting the juice. Then separate the fruit segments from the thin intermediate membranes, also collecting the juice.
Squeeze the remaining orange.
Peel the apple and pear, cut into quarters, remove the core and cut into pieces.
Mix orange and grapefruit juice, Campari and vanilla sugar until sugar is dissolved.
Mix the fruit in a bowl and pour the juice over it.
Refrigerate the fruit salad with Campari and let it stand for an hour.