We took 2 of our grandchildren to West Stow where there is a reconstructed Anglo-Saxon village. The theme was Anglo-Saxon food. Despite the disgusted look on our grandson's face, he actually enjoyed it. One of the drinks was dandelion coffee, which we made many years ago. Actually it is rather good. You dry dandelion roots, bake them in the oven, then grind up. https://en.wikipedia.org/wiki/Dandelion_coffee