Make the chickpea salad, placing all ingredients in a medium bowl, mix and smash with a fork until well combined.
Assemble the sandwiches. Spread a little whole grain mustard on the bread.
Top with lettuce and a generous amount of the chickpea salad.
Layer sliced cucumber, carrots, radishes and avocado.
Top with a mound of sprouts and bread.
Cut in half and enjoy!