Are there any vegan bakers out there? I would love to veganize my mother's recipe for Irish Soda Bread and I have it mostly figured out. The one thing I'm stuck on is that the last step before putting it in the oven is to brush the loaf with a beaten egg yolk, which gives it a nice crispy, glossy crust. I supposed I could just leave this step out, but is there a vegan alternative to the egg yolk that I can use instead?