For the cashew sauce, add all the ingredients to a blender and blend until smooth. Taste and add more spices as desired. Set aside.
To make the patties, chop the onion into small pieces and mince the garlic.
Finely chop the mint and chives.
In a saute pan, heat 1 tablespoon of extra virgin olive oil on medium-high, and once hot, add the chopped onion and garlic. Saute for 3 minutes or until soft and translucent.
Remove from the pan and add to the blender along with 1 tablespoon of extra virgin olive, chickpeas, flour, salt, black pepper, chili powder and minced herbs.
Blend until well combined but still slightly chunky.
With wet hands, form into 4 equal sized patties.
Add oil to a large saute pan and fry the patties until golden brown, about 3 minutes on each side.
While the patties are frying, toast the burger buns in the oven until crispy. Assemble the burgers by layering the patties as well as the add-ins into the burger bun and drizzling with the cashew sauce.