Published this month is a new Norwegian Fruit and Vegetable Encyclopedia written by Kari Vetlesen
Among its pages you will find both Hablitzia and Hosta (mentioned for the first time in a Norwegian book as edible?)
Unreleated, I hadn’t seen the following article about eating Hosta before: https://www.pressherald.com/2017/06/04/flower-power-on-your-plate
The picture is mine (entitling me to a free copy of the book!), taken in the Oslo Botanical Garden some years ago! Note that older leaves are also good (cooked)!
Perennial vegetables, Edimentals (plants that are edible and ornamental) and other goings on in The Edible Garden