Drain the beans, then peel the broad beans, discarding the skins. Transfer them to a food processor along with the onion, garlic, baking soda, boiled potato, herbs and spices. Process for one minute, then scrape down the sides and mix to ensure even blending. Repeat this process five times.
25 g Boiled potato , 100 g Onion, 1½ teaspoon Ground parsley, 1 teaspoon Ground coriander, 1½ teaspoon Ground mint, ¼ teaspoon Lebanese Seven spice, ½ teaspoon Ground Paprika, ½ teaspoon Ground cumin, ¾ teaspoon Salt, ½ teaspoon Ground black pepper, 2 cloves Garlic, ½ teaspoon Baking soda