Turning human corpses into food for humans, safely, hygienically, economically - how?

Darling, might I suggest you take a gander at The Humanure Handbook?

It explains, in exhaustive detail, why we usually don’t use raw material for fertilizer, and how proper composting renders just about anything suitable for putting on crops.

Plus it’s a great read.

Anyway, the obvious answer to this question is to take the corpses and subject them to a well-managed composting process. Voila! Fertilizer.

From a practical standpoint, I love the idea of using the fertilizer for biodiesel crops. That eliminates a lot of the concerns about squickiness and disease. The process could be expanded so that it can process any and all animals, such as roadkill deer, euthanized animals, or all those damn Canada geese that poop all over everything. Hey, a girl can dream, right?

Thus far nobody has mentioned Bacon Salt.

Surely a liberal sprinkling of that blessed condiment would add much to the taste of dear departed Aunt Mildred

Mmmmm, sausages. Just like Granma used to be.