In a small food processor or high-powered blender, combine the beans, lemon juice, miso, sea salt, black salt, tahini, yeast, garlic, syrup (if using), and 1 tablespoon of the water.
Puree, adding the additional 1⁄2 tablespoon water if needed. (Just don’t add too much; the dip should be thick.)
Taste, and season with extra lemon, salt, or garlic, if desired.