Soak beans for 24 hours in water. The next day, boil the garbanzo beans with baking soda until the beans are tender. Drain the beans and add them to a food processor along with the minced garlic, lemon juice, tahini, and salt. Mix in the food processor until smooth. Refrigerate until cold and serve.
Tahini is a Middle Eastern sesame paste that can be found at most grocery stores.