Sesame Ginger Roasted Cauliflower Soup

Bahan-bahan (4 porsi)

• 1 large cauliflower (2 to 2 1/2 pounds), cut into florets
• 3 tablespoons olive oil, divided
• fine sea salt and freshly-ground black pepper
• 1 white or yellow onion, diced
• 5 cloves garlic, minced
• 1 tablespoon minced fresh ginger
• 4 cups vegetable or chicken stock
• 2/3 cup coconut milk, plus extra for drizzling
• 1 teaspoon toasted sesame oil
• toppings: sliced green onions, toasted sesame seeds