Drain and rinse beans well. In a food processor, combine all ingredients except parsley. Process on high until texture is very smooth and creamy. Pulse in parsley. Adjust ingredient amounts to suit your taste; this is a very forgiving recipe and amounts do not need to be exact. Place in covered bowl and chill for at least 2 hours. Serve with warm pita bread, pita chips and assorted vegetables cut to dipping size (carrots, bell peppers, onions, etc.).