Prepare the Dressing by gathering all dressing ingredients into a small blender or food processor.
Blend everything together until completely smooth and creamy before setting it aside.
In a large mixing bowl, add rinsed chickpeas and lightly mash them until desired consistency.
Incorporate finely diced cabbage, red onion, cucumber, jalapeño pepper, and a pinch of salt and pepper into the mashed chickpeas; toss well.
Pour the prepared creamy dressing over the chickpea mixture; gently toss until fully coated.
Spread hummus on one slice of bread and Dijon mustard on another; add extra spinach and top with the green goddess salad mixture before closing the sandwich.