I went to Wageningen University open day in ~1999, with school (4 VWO). After a speech by a professor, it was lunch-time. I didn't take lunch with me, assuming I could buy some there, but I barely had money with me as well. Well, they were serving two things for free as some kind of pilot or demo. It was grasshoppers with Italian spices and vegetables, and mealworms in white sauce. My co-students were laughing at me, but I tried both and actually liked both. After I went a second time, they no longer had grasshoppers, so I only got a portion of maelworms (I'm not a fan of white sauce). They had a good taste, kind of a nutty flavor. Only issue with the grasshoppers is that parts of them get stuck in your pockets.

Fast forward, in this decade I ate insect burgers by a Belgian company called Damhert. Again, nutty flavor, and tasted well. In Africa, insects already get eaten as they're a cheap and reliable source of protein. Unfortunately, it isn't quite clear if insects suffer from pain. At the very least they don't have a CNS, like mammals do. There is even a Dutch "insect cookbook" [1]

Maastricht University is also busy feeding 11 billion, with the in vitro burger (meat based on stem cells). Don't have a link at hand. While not strictly vegan (the stem cells are taken from a live animal), it is vegan in spirit as it reduces animal harm substantially.

[1] https://www.bol.com/nl/p/het-insectenkookboek/92000000397193...