Place the chickpeas in a medium saucepan and add the baking soda. Cover the chickpeas by several inches of water, then bring the mixture to a boil over high heat. Continue boiling, reducing heat if necessary to prevent overflow, for about 20 minutes, or until the chickpeas look bloated, their skins are falling off, and they’re quite soft. In a fine-mesh strainer, drain the chickpeas and run cool water over them for about 30 seconds. Set aside (no need to peel the chickpeas for this recipe!).