One broad bean has clawed its way back from extinction. First mentioned in 1778 and later discussed in a London Horticultural Society report in 1831 was the “red blossomed” broad bean.
Hamburg parsley, sometimes known as turnip rooted parsley or parsnip rooted parsley is a real novelty in the UK which you are unlikely to be able to try unless you grow your own although it is much more popular in (obviously) Germany but also other parts of Europe.
If you’ve ever spent any time in southeast Asia or if not at least visited your local Thai or Vietnamese restaurant you would almost certainly have tasted the perfumed taste of lemongrass. You might not realised it but it is an actual grass, but one with a fragrant citrus and slightly coriander taste and scent.