Drain and rinse garbanzo beans. Place half of the garbanzos and all of the remaining ingredients in a blender. Blend until smooth, then gradually add remaining garbanzos through the cap opening while continuing to blend. Add a small amount of water or more olive oil for desired consistency. Sample and adjust other ingredients to taste.
For those concerned about fat content, use only 2 tablespoon olive oil and replace the other 2 tablespoon with water or vegetable broth. This will affect the flavor slightly, but it is still very good.