Cannas: Cooking cannas?, 1 by salix_man

salix_man wrote:
I just dug my cannas and some roots are 2" in diameter. I think I read somewhere that they are edible. (edible does not mean tasty) I have no idea what variety, green leaves, red flowers.
Has anyone ever eaten cannas? How are they cooked? I have to bring a vegetable dish for the garden club pot luck, but I think it would be prudent to try them first. Any suggestions would be helpful. I googled canna recipes but all I got were about a different plant altogether. I think they thought I left "bis" off my query.
The first pic is a seedling. The other was taken in early July

Herman