Layer on cucumber, red onion, and tomato. Sprinkle salt on the tomato, then layer roasted red pepper, spinach, and chopped basil.
Notes
The hummus will last in the fridge for up to 5 days in an airtight container. I recommend making the sandwich right before you eat it.If you want to make it in advance, I recommend slicing all the ingredients to have them ready and then assemble at the last minute.