Make the dressing while the quinoa is cooling.
Place all of the dressing ingredients in a blender or food processor except for the oil.
Pulse on high speed until well mixed.
Slowly drizzle in the olive oil with the machine on high and blend until the dressing starts to emulsify. Set aside.
Once the quinoa is cool, transfer it to a large mixing bowl.
Add the garbanzo beans, peppers, onion, cilantro and feta.
Gently toss together then start to add the dressing.
Once the dressing has been added toss again and transfer to a serving bowl.
Add some more cilantro or feta to garnish.
Serve at once or keep in the fridge until ready to use.