In a small saucepan, bring 1 cup water and saffron to a boil. Reduce heat and simmer, covered, 5 minutes. Add chickpeas and a pinch of salt and simmer 5 minutes more. Set aside.
Heat oil in a large skillet over medium heat and cook onion, stirring, until softened, about 4 minutes. Add pepper, garlic, cumin, and coriander and cook, stirring, about 5 minutes more. Stir in all greens, then add chickpea mixture and cook until greens are just wilted. Season with salt. Remove from heat and mix in chopped herbs.
Divide quinoa among four bowls and top with vegetables, avocado, and seeds. Garnish with herbs.