Heat 3 tablespoons of the olive oil and fry the red onions gently, until it is cooked through and lightly golden. Add the garlic and chili and cook for a few more seconds, until you can smell the garlic. Take care not to brown the garlic. Let cool completely.
Add feta, scallion, cilantro, parsley and lemon juice to the chickpeas and season with pepper and a pinch more salt, if needed. Add the cooled garlic oil and remaining olive oil and mix very well.