Let the dried chickpeas soak into abundant water overnight.
Wash the chickpeas, add them to a pot with enough water, some salt, a couple of rosemary twigs and two peeled cloves of garlic.
Bring the water to a boil, reduce to a simmer, and let the chickpeas cook until soft, around 50 minutes.
Save some of the cooking water (at least a couple of cups) and drain the chickpeas and add them to a blender.
Add the cooked garlic, some olive oil, pepper, the zest of half a lemon and the lemon juice. Blend all together and add some cooking water to make the chickpea cream velvety.
Serve the cream with some olive oil and walnuts on top, and accompany everything with a slice of bread toasted with some rosemary.