I know they exisit. I have seen them in France. They are little crunchy root vegtable/tuberish things. They are in season now. I was AMAZED that a search on Chowhound came up empty with zero results found. Further investigation led to almost no info online and no pictures. They are listed on random menus:
This just makes me curious. Does anyone know anything about Cronses? Is there another name that they are better known by?