Preheat oven to 400℉. Line a 9x13 inch baking sheet with parchment paper.
In a mini food processor, pulse together chickpeas and egg until completely smooth. Transfer mixture onto the baking sheet and spread out thinly and evenly.
Topping:
In a small bowl, add in the chia seeds, 2 tbs water, olive oil, mustard and spices and mix together until combined. Evenly spread this mixture on top of chickpea mixture. Sprinkle top with parmesan cheese and divide into small squares with a bench scraper or knife. Bake for 30 minutes or until golden brown on top. Allow to cool for 15 minutes. Separate the crackers and serve.
Notes
I also recommend cooking these in your air fryer for crispiest results. Obviously, lessen the time by half if you are using an air fryer.
Store leftovers in an airtight container in the fridge.