You can 'sugar' violets and I do have a hazy memory of one of my ancient British 'aunties' having them as the definitive touch on delicately iced cakes. She also used to carry a small tin containing tiny, lavender-colored sweeties called Palma violets which she would dole out, not very generously. at the rate of one per visit
Also, have you ever tried Sunchoke pate? It is totally delicious and highly nutritious. It's strange how people are turned off by their name - even though they are written up Larousse Gastronomique. They can also be called 'girasol' which is a name I rather like because it refers to the flower and its habit of turning to follow the path of the sun.