I really want a nut tree, like the hazelnuts the posh bloke on telly is picking. In fact I think we have a hazel but suspect it is sterile/ornamental (does that sound right?)
I think people grow olive trees don't they - can you actually get edible olives from them?
what about mushrooms? I have vague hippy memories of people growing them in shit in cupboards...
i have a south facing wall: am thinking of espaliered fruit trees...?
What other interesting food do you grow?