Halve the passion fruits and spoon out the pulp into a sieve placed above a bowl. Stir with a spoon to separate the passion fruit juice from its seeds.
Decant the wine into a large pitcher or a wine tap. Wash the tangerines, lemon and apple and cut into equally thin slices. Add the cut fruit, passion fruit seeds and passion fruit juice to the wine.
Add a bit of the concentrated fruit juice or fruit liqueur to taste. Stir the sangria with a wooden spoon and taste it! You might want to add a bit of extra concentrated fruit juice or honey. Refrigerate the sangria.