Step 1

Slice the stem and green leaves off the leeks, leaving the white and light green parts. Cut the leeks in half lengthwise, then chop across.

Step 2

Place the chopped leeks into a colander and run under cold water to remove dirt and debris.

Step 3

Heat the olive oil in a large pot or Dutch oven over medium heat. Add the leeks and sauté for 8 to 10 minutes, until softened (but not browned). Then add the garlic and stir for another minute.

Step 4

Add the diced potatoes, salt, bay leaf, thyme, and vegetable stock. Increase the heat to high and bring to a boil, then reduce the heat to low, cover, and simmer for 15 to 20 minutes, until the potatoes are fork tender.

Step 5

Remove and discard the bay leaf and thyme sprigs. Use an immersion blender to blend the soup until your desired level of creaminess. Alternatively, you can blend the soup in batches in a high-powered blender.

Step 6

Top the potato leek soup with chopped chives and freshly ground black pepper before serving.