Place the chickpeas, into a large mixing bowl and use a fork or your hands to smash the chickpeas. Next, add in grapes, celery, green onions, dill, and walnuts
In a small bowl, add tahini, lemon juice, salt, pepper, and garlic powder. Whisk to combine. Add the apple cider vinegar, then the iced water, and stir until smooth. Add additional ice water 1 tablespoon at a time, until you have a smooth, pourable thick dressing.
Pour the tahini mixture over the chickpea mixture and toss to coat. Taste and add additional salt and pepper as desired. Serve inside lettuce cups, or in a sandwich.
