Drain and rinse the chickpeas. NOTE: Be sure to reserve at least 2 TBSP of aquafaba (liquid from the can). Add all remaining hummus ingredients to a food processor. Blend all ingredients. Add aquafaba to thin out the hummus. Continue to process until the hummus is smooth.
Spread the desired amount of hummus on both slices of bread. Dash with red pepper flakes if a little heat is desired. Add remaining veggies. Assemble the sandwich, slice and enjoy!