Drain 1 can (15 1/2 oz.) garbanzos, reserving liquid. In a blender or food processor, whirl garbanzos, 3 tablespoons tahini (sesame paste), 2 tablespoons olive oil, 1 tablespoon lemon juice, 1 peeled clove garlic, and 1 teaspoon ground cumin until smooth. Thin with a few tablespoons reserved liquid if desired. Add salt and pepper to taste.