Heat water in pot. Add 1 tablespoon salt and 1 tablespoon pepper. Once boiling add potatoes and cook until you can easily put knife in potato. Aprox 10 minutes. Drain, mash and cool potatoes.
In same stock pot put on med high and add Earth Balance. Once melted add mushrooms and white pepper and cook until tender. Once tender add salt and leeks and cook until leeks are transparent.
Next add the coconut milk, vegetable broth, and potatoes. Cook aprox 30-40 minutes.
Next we will need to blend the soup. If you are using a traditional blender let the soup cool at least 30 minutes to an hour first to prevent burns. If using an immersion blender you can blend immediately. Blend until smooth. At this point you may need to thin with vegetable stock and taste to see if needs more salt and pepper.