Ingredients
Method
- Melt butter in a large pot over medium-low heat. Add leeks and a pinch of salt and cook, stirring occasionally, until soft but not browned, about 8 minutes.
- Add potatoes, broth, salt, pepper, and thyme. Bring to a boil, then reduce to a simmer and cook uncovered until potatoes are tender, 15 to 20 minutes.
- Discard thyme. Remove pot from heat and blend with an immersion blender until completely smooth, about 1 minute. If using a standard blender, blend in batches with care.
- Return soup to a gentle simmer, taste and adjust seasoning, then ladle into bowls and finish with olive oil or fresh herbs.
Notes
The soup will be a pale, creamy green and will thicken as it sits. When reheating, stir in a little broth to loosen it. If you are skipping the butter, a good fruity olive oil brings its own richness.
