Drain the chickpeas and collect the liquid. Set aside some chickpeas for decoration.
In a bowl, mix the chickpeas, olive oil, tahini, lemon juice and the zest with the finely chopped clove of garlic. Grind the peppercorns, cumin, caraway, allspice and mustard seeds in a mortar and add to the chickpeas.
Then chop everything up with the hand blender until a cream is formed. Dilute with the collected liquid and season with a little salt if necessary.