Heat the coconut oil in a pot, and add the red onion; sauté on medium heat until it turns a light golden brown. Stir in the peas and potatoes, and add the vegetable stock and coriander powder. Bring to a boil on high heat; cover the pot, lower the heat and leave to simmer for 20 minutes.
Add the fresh mint, coconut cream and season with salt and pepper. Using a hand blender, puree the mixture to a smooth consistency, and leave to simmer for an additional 5 minutes. Remove off heat and stir in lime juice.
Serve the soup in a bowl, garnish with a drizzle of coconut cream and chopped coriander.