Put the avocado, chickpeas and tahini in the blender or food processor and blend it together, slowly pouring in the ice water into it in a steady trickle, until it’s completely smooth. Stop and scrape down the sides of the food processor if necessary. Season to taste.
Serve the avocado hummus in a nice bowl.Use the back of a spoon to make some swirls in the hummus and decorate it with the toppings you decide to use. Serve with warm pitta, naan or crudités.