Add the broth & veggies to the stock pot and bring to a boil. Lower the heat and simmer on a low boil for 10-15 minutes, or until the veggies are tender.
Transfer the broth and veggies to a blender and blend until smooth.
Place the empty pot back on the stove over medium heat and add the oil. Pour in the couscous and dry seasonings. Toast for a couple minutes, stirring frequently. Pour the broth/veggie mixture back in the pot along with the coconut milk. Bring to a boil, lower the heat and simmer for 10 minutes, or until the couscous is cooked through.
Taste and adjust the seasonings as needed. Ladle into bowls and top with chopped green onions.
Notes
The longer the soup sits, the thicker it will become - the couscous will continue to absorb the broth. You can add more broth if needed or just eat it more like a porridge.
Want to add some plant protein to this? I really like adding cubed tofu when I add the couscous. You could also do a can of chickpeas or white beans.