Heat medium sized soup pot over medium heat, add coconut oil, leeks, onions, celery and garlic. Saute for 3-4 minutes until they are softened, but not browned.
Add cauliflower, thyme and turmeric, stir to coat cauliflower with spices and oil.
Add cashew nuts, and stock. Bring mixture to a boil, turn down heat to a simmer and cover.
Cook for 30 minutes or until cauliflower is soft.
Add hemp seed milk to soup. Puree soup in blender or with immersion style blender until smooth and creamy. Taste and add salt and pepper as needed. (the amount will vary depending on stock you have used). Garnish soup with fresh minced chives
Preheat oven to 400 degrees.
Wash reserved green tops of leeks in water, drain and pat dry with a towel. Cut leek tops into thin slices or chop into small dice. Place in a bowl, drizzle with a small amount of olive oil and a sprinkle of salt.
Line a sheet pan with parchment paper, place seasoned leeks in a single layer on pan.
Bake in preheated oven for 20-30 minutes, stirring occassionally for even browning. Bake until just lightly golden, being careful not to burn. Cooking time will vary depending on size of leeks.
Garnish soup with a few leeks crisps or serve on the side.