Yeah, that sure looks like a
stinkhorn witch's egg to me. Be sure that you dont mistake it for other members of the familly as it contains some of them are lethal.
I have however eaten the inner part of the stinkhorn egg and for a start they don't smell like they do when they have fully formed.
To me they taste and smell like a fairly crap radish, by fairly crap I mean the ones that aren't really that hot.
I'll hunt them out when I think they are on offer though and out of the fungi I'd have to say they have a fairly Ok flavour.
When they emerge from the egg and grow to look like a knob they also start to stink like something has died, can't see anyone wanting to eat one then.
Also, that gelatinous covering is as far as I've been told the w way you can tell its one of the edible ones, without it and that egg contains something that could well kill you.