Heat olive oil in a large stock pot over medium heat.
Sauté the onions and garlic for 4-5 minutes, or until the onions are translucent. Add the zucchini, broccoli, potatoes, vegetable stock and coconut milk. Bring to a simmer, cover, and cook for 20-25 minutes, until the vegetables are cooked through and the potatoes are falling apart.
Turn the heat off and add the spinach, basil, lemon juice and tamari. Stir until the spinach and basil are wilted.
Blend the soup with an immersion blender or in a blender* in batches until completely smooth.
Return the soup to the pot and stir in the cooked quinoa.
In a separate bowl, stir the miso paste together with several tablespoons of warm water to create a loose paste. Stir this into the soup.
Enjoy this soup with a drizzle of olive oil and several cracks of pepper.
*If blending the soup in a blender, make sure that there is a vent for the hot air to escape from.