Coconut Curried Cauliflower Soup

Preheat the oven to 420 degrees. Line a baking sheet with parchment paper.Put the chopped cauliflower on the baking sheet, drizzle with 1 teaspoon of olive oil and sprinkle with sea salt. Roast the cauliflower for 30-40 minutes, or until it is soft and dark brown in many spots.While the cauliflower is roasting, begin the rest of the soup. Heat the remaining 2 teaspoons of olive oil in a large pot over medium-high heat. Add the onion and sauté for 5 minutes. Add the carrots and continue to cook, stirring occasionally, until both the carrots and onion are brown, about 10 minutes. Add the ginger and garlic and cook for 1 minute. Add the turmeric and Thai curry paste and cook for 1 more minute. Deglaze the pan with a splash of the stock, scraping the bottom of the pot to remove and dark bits.Add the remaining stock and bring the pot to a boil. Reduce the heat to low and gently simmer until the cauliflower has finished cooking. Pull the cauliflower from the oven and add it to the pot (reserve a few small pieces for garnish, if you'd like)Using an immersion blender (or, working in small batches, use a regular blender) blend the soup until it is very smooth. Add the coconut milk and season to taste with sea salt.Serve the soup garnished with the reserved cauliflower florets and a little green onion.