Caramelize sugar with butter in a pan; Braise the onion, carrots, potatoes and ginger in it; Deglaze with wormwood, add green pepper + coriander and let simmer for about 15 minutes.
Puree the carrot mixture finely, season heartily.
Fry the prawns in the remaining fat for 1-2 minutes, distribute the puree on plates, place the prawns on top, optionally decorate with chervil, tarragon or parsley.