For the asparagus-mango salad, wash the asparagus, cut off the woody ends and cook the asparagus in enough salted water until al dente.
Drain and cut into approx. 3 -4 cm pieces. Peel the onion, cut into thin rings and fry briefly together with 1 tablespoon olive oil, add the brown sugar and let it caramelize.
Deglaze with the mango cider vinegar and the balsamic vinegar and remove from heat. Peel the mango, remove the pit and dice the flesh.
Clean the young onion and cut into fine rings. Mix all ingredients for the marinade well. Mix asparagus pieces, mango pieces, caramelized onion rings, young onion and mix with the marinade.