I've never eaten or cooked insects, but I wanted to give it a try some time. Now, we found a few grubs 4-6 cm in length, that we think to be cockchafer grubs, in one of the pots on our balcony. So I think of giving it a try - my approach would be beer batter and deep frying (Everything is tasty with fat), but there are a few things I want to know before.
By "we think their are cockchafer grubs" I mean that the pictures on wikipedia fit.
The grubs obvioulsy eat earth, their rear parts are very dark. How do I best get rid of the grub-shit/earth from the grubs? I don't want to eat earth because it a) does not sound tasty and b) earth contains pathogen building bacteria.
How do I assure that they are not poisonous, or horribly unhealthy?
So, has anyone eaten these grubs and can share some experience?
Edit to add: I live in southern germany. Cockchafer beetles at least where eaten in the 19th century in France, I found no info on the grubs.