Creating Potato Leek Soup is simple when you follow these steps:

1. Prepare the Leeks: Clean the leeks thoroughly. Slice them in half lengthwise and rinse under cold water to remove any grit. Chop them into thin slices.
2. Sauté the Onions and Leeks: In a large pot, melt the butter over medium heat. Add the chopped onions and leeks. Sauté until softened, about 5-7 minutes.
3. Add the Potatoes: Stir in the diced potatoes and cook for an additional 2-3 minutes.
4. Pour in the Broth: Add the vegetable broth to the pot. Bring to a boil, then reduce heat to a simmer. Cover and cook for about 20 minutes, or until the potatoes are tender.
5. Blend the Soup: Using an immersion blender, blend the soup until smooth. If you prefer a chunkier texture, blend only half of the soup and leave the rest as is.
6. Stir in the Cream: Return the soup to low heat. Stir in the heavy cream, salt, and black pepper. Heat through but do not boil.
7. Taste and Adjust: Adjust seasoning as needed, adding more salt or pepper if desired.
8. Serve: Ladle the soup into bowls and garnish with fresh chives if using.

These steps will guide you in creating a delicious Potato Leek Soup that is sure to impress!