Cut the lemongrass into thin slices and heat it along with the other ingredients up to about 70° C. It should not boil, only steam. Let the broth steep on a low flame for at least 30 minutes with the lid closed. Pour it through a fine sieve afterwards.
Wash the wild berries well or, if using frozen, defrost them. Dissolve the gelatine in some cold water (about 5 minutes), squeeze it out well with your hands and dissolve it in the still hot broth. Let it cool down a bit afterwards.
First fill your dessert bowls halfway with berries. Then pour the lemongrass broth on it until the bowl is filled to the top.
Now put the bowls in the fridge for at least 4 hours. You can also prepare the lemongrass jelly dessert in a terrine form. Cut it into pieces and serve.