Soak the chickpeas for atleast 24 hours.
Place all the ingredientes ina small saucepan. Bring the mixture to a boil and cook for 3 minutes. Let thepickled onions cool to room temperature, at which point they should besufficiently pickled to use.
In a food processor, combinethe soaked and drained chickpeas, onion, carrot, garlic cloves, parsley,coriander, salt and cumin. Process until fairly smooth. Leti t set for about 30minutes in the refrigerator.
In the meantime make thehummus. In the bowl of a food processor add all the ingredients and blend for acouple minutes, until the hummus is smooth and creamy.
Then shape the chickpeasmixture into 4 burgers with your hands. In a large skillet over medium-highheat. Add burgers and cook until golden and warmed through.
To assemble the burgers spread2 tablespoons of hummus on each bottom bun. Place a Patty on top of each oneand top with spinach and pickel onions. Top withremaining buns.
