In a small bowl, bring combine ½ cup cashews with hot water. Allow to soak for 30 minutes.
In a small pot, bring 2 cups water to a boil. Add the wild rice then reduce to a simmer and cook for 45 minutes. Remove from the heat, cover with a lid and allow to sit for 15 minutes.
Meanwhile, in a large pot, warm 2 tablespoons olive oil over medium heat. Add the onion, and cook for several minutes, until translucent. Add the celery and carrot, stir, and continue to cook for a few more minutes.
To the pot, add the mushrooms and garlic. Cook for several minutes then add 2 tablespoons tamari, 1 teaspoon dried thyme, and 1 teaspoon dried oregano. Stir intermittently while continuing to cook for about 5 minutes more.
Once the cashews are done soaking, strain off the excess water and place them in a high speed blender (such as a NutriBullet or Beast Blender). Add 2 cups water (or broth) and 1 tablespoon cornstarch then blend on high, until smooth.
Pour the cashew cream into the pot along with 2 cups vegetable broth. Bring to a boil then reduce to a simmer and cook for about 10-15 minutes*. Turn off the heat off and add the cooked wild rice to the pot. Serve warm with fresh parsley (optional) and enjoy!