In a blender or food processor, combine chick-peas, lemon juice, tahini, 1/4 cup water, garlic, oil, cumin, cayenne, and pepper.
Process, scraping sides occasionally, until mixture is a smooth paste.
If mixture is too thick, add more water, a few drops at a time.
Stir in parsley.
Tip on tahini: You can find tahini, a sesame seed paste, in health food stores and some supermarket. If you prefer, you can make your own by blending 1/2 cup sesame seeds, 1 tablespoon water, 1 tablespoon fresh lemon juice, and a few drops of vegetable oil.