prepare the veggies and chickpeas
Add drained cooked chickpeas and drained cooked beans to a large bowl. Add grated carrots, diced celery, diced shallot, mayo, and Planet of Plants sauce or hummus. Season with salt, pepper, diced parsley, and lemon juice. Using a fork, mash everything together to get a creamy mixture.
Assemble the chickpea salad sandwich: If desired, add some lettuce leaves on top of the bread. Top the sandwich with a chickpea spread and cover with bread.