I used 2 cans (15 oz) garbanzo beans, 3 cloves garlic, 2 tablespoons tahini, juice of 2 lemons, zest of 1 lemon, 1/2 jalapeño, and 1 cup of parsley.
I threw everything into a food processor, added salt and pepper, and blended with 2 or so tablespoons of olive oil. I blended all the ingredients for about two minutes then scraped the bowl and blended for several more minutes. I figure that longer it goes the smoother it can potentially get.
The end result is a green hummus that I like to use for dipping vegetables or serving under roasted chicken and pita.