Sweet Potato Coconut Soup

Boil 6 sweet potatoes  (or yams or japanese sweet potatoes), 2 red potatoes , 1 yellow onion and fresh ginger  in 4 cups of water.

When cooked you can remove some of the water.

Use an immersion blender or put in a blender to blend together.

Add 1 can coconut milk and 1 bunch cilantro (with stems).
Blend until desired consistency.