
Insects...
...makes sense.
You can already buy insect based flour in the UK, very expensive mind. The kids and I have eaten meal worms and they were just like snacking on twiglets and quite tasty; crickets were really dry and hard to eat. Grubs, not so keen, apparently they are like eating tomatoes...and I hate tomatoes.
However , grind up crickets into flour and you'd never know.
Not sure how those weird veggies (you know, the ones that eat fish) stand on eating insects.