Saute diced onions and veggies for 3 minutes
Add cilantro, garlic, green chilis, salt
When mixture is softened, remove from stove and cool
Add drained chickpeas and chickpea flour
Coursely blend in a food processor. Be careful not to over process as it will get sticky and difficult to handle.
Refrigerate for at least 30 minutes
When chilled, shape into patties and place on a sprayed baking sheet.
Bake at 400F for 15 minutes, turning over once or grill on a pan using a little oil to coat the pan.
Assemble the burger with tzatziki on the bun, followed by the patty, then tomato, grilled onions, spinach and sweet potato sticks.