IF you make the soup as an extract you can make it like you would prepare ayahuasca. Just boil the slices in an acidic water solution and let it boil and remove the water layer. If you do this 3-4 times and combine the water layer you can trow away the solids.

this liquid you can boil down to a consumable size, what I heard from shamans in South America this does noet have to be more than a shooter glass. Very nasty but much more easy than eating a whole catus.