Add the chick peas, minced or pressed garlic, and lemon juice to the bowl of a food processor fitted with a metal blade. Fix the lid in place and process until a thick paste is formed. With the food processor still running, drizzle in the tahini. Stop the machine to scrape down the sides, fix the lid back in place and begin processing again, drizzling in the water. If it is moving freely, you have enough water. If it is still thick, you may wish to add a little more water to reach your desired consistency. Let it continue to process for 5 minutes. When the 5 minutes are up, it should be warm and quite silky. Scrape into a serving bowl or dish and drizzle with olive oil, generously sprinkle with za'atar, and scatter with fresh chopped parsley and toasted pine nuts.