Soak the gelatin leaves in plenty of cold water.
Finely chop the celery, mix with the agave in a saucepan.
Let the coriander seeds and fennel seeds first roast in a dry pan until aromas are released, add to the celery and let it stew for 5 minutes while stirring.
Pour cream in a blender.
Add the celery, the soaked and squeezed gelatin and the Zeste and the juice of the lime and mix for 1 min.
Sieve through a fine sieve.
Allow to cool down and stir occasionally.
Divide in silicone molds and let it set at least 4 h into the freezer.
Remove the frozen panna cotta from the molds and place them on the plate on which you will serve them. Let defrost in the fridge.
Finish with the confessed cherries.