Start by draining and rinsing your chickpeas thoroughly. In a large mixing bowl, use a potato masher or a fork to smash the chickpeas until they are mostly broken down but still have some whole pieces for added texture.

Add the ripe avocado to the bowl with your smashed chickpeas. Squeeze in the fresh lemon juice and toss in minced garlic, chopped green onions, diced celery, fresh dill, and diced dill pickles. Mix everything together until it becomes a cohesive filling.

Taste the mixture and season it with salt and pepper according to your preference. If you'd like more tanginess, add an extra splash of lemon juice.

Lay out your slices of bread on a clean surface. Divide the chickpea and avocado mixture generously onto half of the slices, ensuring an even spread. Add lettuce on top.

Cut each sandwich in half diagonally for a lovely presentation. Serve right away to enjoy the fresh flavors.