I bake most of the bread we eat, and it's nearly all vegan. But, for one
thing!

I need/like to glaze some of the loaves, and I haven't found a decent
substitute for egg to do that. I've tried the liquid from tinned
chickpeas, but it's really naff compared to nice shiny egg.

So, can you suggest a decent vegan substitute, please?

We have vegan guests, and I'm fed up with apologising for the poorly
glazed bread.