If you use quinoa, everything can go in together at once, except kale. In a large pot, sauté onion in olive oil until the onion softens. Add the quinoa, chickpeas, broth, orange juice and cauliflower, stir well. Bring pot to a simmer for 10 minutes.
If using farro or rice, after sauteing onion, add grain and 2 cups of broth and simmer covered for 20 minutes. Then stir in the orange juice, remaining broth, cauliflower, chickpeas and cook for 10 minutes.
Add the kale at the end and cook for another 5 minutes until wilted. If the mixture gets too thick, add a little water. Season to taste.