Rinse chickpeas under cold running water. Place in a bowl and mash with a potato masher.
Add the rest of the ingredients and mix well.
Toast the bread if desired.
Place lettuce or kale on one piece of bread and add half of the chickpea salad. Cover with the second piece.
Vegan Mayonnaise
Combine all ingredients except for oil in a high-speed blender and blend on high speed for 1 minute.
Reduce the speed to low and gradually pour in the oil. Continue blending on low speed for another minute. The mixture will slowly thicken.
Store in an airtight container in the fridge for up to 1 month.