Heat up a skillet with 2 tbsp olive oil. Add the onions, salt and pepper, and sauté for 5-6 minutes. Add the sweet potato and cook for a few more minutes. Add the cumin and sweet paprika.
Put the quinoa in a bowl with a good pinch of salt and pepper, the eggs, breadcrumbs, chicken and cheese (I used feta, but any cheese will do), and mix well.
Shape the burgers with slightly wet or greased hands, pressing tightly. Place them on a plate and put them in the fridge for at least 20 minutes.
Grease a skillet with olive oil (you can use the same skillet where you cooked the onions and just add a little more oil) and cook the burgers on both sides on medium heat for 12 minutes, or until they are golden and cooked through.