01 -
Melt butter and cook leeks and garlic until soft, about 10 minutes. Don't brown them.
02 -
Add potatoes, broth, herbs, salt and pepper. Boil, then cover and simmer 15 minutes until potatoes are very soft.
03 -
Remove herbs. Blend until smooth with immersion blender or regular blender in batches.
04 -
Add cream and simmer. Adjust thickness with more broth if needed. Top with chives.