In a large pot heat 2 tablespoons of olive oil and sauté mushrooms on low - medium heat for 8-9 minutes, or until cooked. Add balsamic vinegar & cook further until the moisture has mostly evaporated and the mushrooms are glazed. Place the mushrooms aside on a plate.
Add the remaining 5 tablespoons of oil to the same pot and add onions. Cook until softened, 2-3 minutes. Add the garlic, thyme & rosemary, cooking for 30 seconds.
Pour in broth, coconut milk, celery, carrots, Brain Elixir and bring to a simmer. Cover and continue to simmer for 20 - 30mins, or until soup has started to thicken
Stir the mushrooms back into the pot. Add salt and pepper to taste. Serve immediately.