Turmeric Roasted Sweet Potato and Macadamia Soup

Bahan-bahan (9 porsi)

• 2 medium red onions (peeled and quartered)
• 2 pounds orange sweet potatoes, peeled and cut into chunks ((about 6 1/2 cups))
• 1 tablespoon extra-virgin olive oil
• 1/2 teaspoon Kosher sea salt (plus more to taste)
• 8 cups vegetable broth
• 2 teaspoons minced fresh ginger
• 1/2 teaspoon ground turmeric
• Pinch of cayenne pepper (plus more to taste)
• 1/4 cup unsalted macadamias (70g )
• Fresh lime wedges (to serve)
• 2 tablespoons finely chopped fresh cilantro (to serve)
• Optional chopped macadamias, for garnish