Step 1

Optional - make mushroom stock: Place the dried mushrooms in a bowl and cover with 1 ½ cups (360 mL) room temperature water. Place a smaller bowl or something heavy on top to ensure they stay submerged. Soak for 30 minutes, or until softened.

Step 2

Scoop out the mushrooms. Strain the liquid through a fine mesh sieve to catch any sediment, reserving the stock.Add the rehydrated mushrooms to a bowl of water and agitate with your hands. Drain the water and repeat a few times until the sediment is gone. This ensures the grit won’t make it into the soup. Slice mushrooms and set aside.

Step 3

For fresh mushrooms like cremini and shiitake, slice them (remove shiitake stems). For oyster or maitake mushrooms, tear them into strips with your hands, discarding any tough ends.

Step 4

Heat a Dutch oven or soup pout with the olive oil over medium-high heat. Add the onions with a pinch of salt, and saute for 4 to 5 minutes, or until starting to soften. Add the garlic and cook for another 1 to 2 minutes. Add the butter to the pan, and once melted, add the fresh mushrooms and rehydrated dried mushrooms, if using. Cook for about 5 minutes, until softened. Season with salt and pepper at the end.

Step 5

Pour in the white wine and use it to scrape up any browned bits on the bottom of the pot. Simmer for 3 to 4 minutes, or until the smell of alcohol has dissipated and some of the liquid has bubbled off.

Step 6

If using, pour in the mushroom stock but reserve the last tablespoon or so, as it’s usually sediment-heavy. Add the vegetable broth too (use 4 cups if not using mushroom stock). Add the bouquet garni and bring to a boil. Cover, reduce the heat, and simmer for 15 minutes.

Step 7

Scoop out ⅓ to ½ of the soup (about 2 ½ cups or 550 to 600g), including some mushrooms but not the bouquet garni. Transfer this to a blender and add the cashews, miso and soy sauce. Start slowly then move to high speed and blend until smooth.

Step 8

Stir the blended soup back into the remaining soup in the pot. Bring to a simmer and simmer for 5 to 10 minutes, until the flavors have developed and the soup has thickened slightly. Season with salt and pepper. If you want a slight pop of acidity, add the Dijon mustard. Remove the bouquet garni.

Step 9

Ladle soup into serving bowls. Top each with a tiny drizzle of good-quality olive oil, if a little extra richness is desired, and garnish with a small handful of chopped parsley/chives.