Add the sweet potato and butternut squash, stirring well with the leeks and garlic. Add the salt, pepper, red pepper flakes, dried thyme, and turmeric, stir well.
Add the water and stir. Bring the mixture to a boil, then reduce to simmer until the liquid has been reduced by half, stirring occasionally. This should take about 30 minutes.
Once the water has been reduced add the coconut milk and continue to simmer for about 10 minutes.
Remove from heat and blend in a high speed blender or with an immersion blender.
(Optional) Serve topped with pepitas, roasted chickpeas, and/or fresh thyme.
Notes
The soup will stay well in the fridge for up to one week.
Recipe by The Mexitalian at https://themexitalian.com/squash-sweet-potato-leek-soup/