Drain and rinse one can of chickpeas. In a mixing bowl, use a potato masher to smash them until mostly broken.

Add avocado, lemon juice, garlic, green onion, celery, dill, and pickles to the smashed chickpeas. Season with salt and pepper and stir until creamy.

Lay out your bread slices. Spread a generous scoop of the filling on one slice. Top with lettuce, then place a second slice on top.

Cut each sandwich in half and serve fresh on a plate.