Rinse the nettles thoroughly in a colander.
Since we only use the nettle leaves, remove the nettle stems using gloves or cut them off with a scissor.
In a large pot, heat up the olive oil over medium heat.
Add onions and garlic and cook for a few minutes.
Add potatoes and let cook for about 3 minutes.
Add vegetable stock and bring to a boil. Let simmer for 10 minutes.
When the potatoes are tender, add lemon juice and nettle leaves. Bring to a boil and let simmer for 2 minutes.
Remove the pot from heat and blend the soup.
Put the soup back on the heat, and add coconut milk, nutmeg, and salt and pepper.