Press beans through the food mill to remove the skins. Add a couple tablespoons of olive oil as necessary to fully remove the skins.
Pour the beans into the bowl of the food processor. Add tahini, lemon juice, and garlic. Process on low until thick and smooth, drizzling the olive oil in slowly. Adjust flavor with additional lemon juice as desired. Add salt to taste and finish processing.
Spread into a shallow serving dish. Garnish with a swirl of olive oil, parsley, and a sprinkle of paprika.
Variations:The flavor is best with garbanzo beans cooked at home, but you can use a 15-ounce (425 g) can of garbanzo beans in a pinch.