
Place the avocado, chickpeas, minced shallot and lime juice in a mixing bowl. Mash well with a potato masher or fork to desired consistency, it should be mushy with some lumps left. Season with salt and pepper to taste.
To assemble the sandwich, layer the bottom slice with some arugula and half the chickpea salad. Top with sliced red onion or pickled red onion and more arugula. Add top slice to the sandwich, cut in half and enjoy! Repeat with the second sandwich, or save the chickpea avocado salad for another day.