Not quite what you meant by vegetables, perhaps, but Loganberries and
Tayberries can take a fair amount of shade, and won't take-up a lt of
space if grown against the wall, or over it.

Courgettes ought to do quite well, but to ripen the larger cucurbits
(and cucumbers) I'd guess you need more sun. Spinach or spinach beet
should be OK.

--
Rusty