01 -
Trim dark green tops and root ends from leeks. Slice them lengthwise and rinse thoroughly under running water to remove grit. Slice into thin half-moons.
02 -
Heat olive oil or butter in a large pot over medium heat. Add sliced leeks and sauté for 8 to 10 minutes until soft and fragrant. If using garlic, add it in the last minute and cook until aromatic.
03 -
Stir diced potatoes into the pot to coat with oil and leeks, then pour in broth. Bring to a boil, reduce heat to a simmer, and cook for 20 minutes until potatoes are tender.
04 -
For a smooth texture, use an immersion blender directly in the pot or carefully transfer soup in batches to a blender and puree until smooth. For a chunkier texture, mash a portion of the soup manually.
05 -
Season soup with salt and freshly ground black pepper to taste. Ladle into bowls and garnish with chopped chives, a drizzle of olive oil, or a dash of cream if desired. Serve immediately.