Riftweed

A tall, stalk-plant which grows in cracks in the ground, where the dirt has become moist from underground steam vents. The top part of this plant is filled with pea-like grain, almost like a mix between corn and the top part of the cattail. This is grown by the Fire-worshippers, both to get food for their toasthen and to make flour. It's hard to grow things in ashhome, but Riftweed is one of the easier options. As long as you find a steamwent.