Great ideas Bogu! Worth knowing that stinging nettle is possibly the best green-leafy herb for vegans and vegetarians as it is so incredibly high in protein. Some reports of it being over 20% protein – that’s really good! The nuts are also a great winner of course! Dandelion would also build things up somewhat and if you could get them, starchy roots, but not the thing to forage from the city.
Urban Herbology Apprenticeship
Foraging, Growing and Using Herbs in Cities