Follow these easy steps to create the comforting Leek & Potato Soup:

1. Prepare Leeks: Start by trimming the root end and the tough green tops of the leeks. Slice them in half lengthwise and rinse thoroughly to remove any sand or dirt.
2. Sauté Vegetables: In a large pot, heat the olive oil and butter over medium heat. Add the chopped onion and sliced leeks. Sauté for about 5-7 minutes, or until softened and translucent.
3. Add Potatoes: Stir in the diced potatoes and sauté for an additional 2-3 minutes.
4. Add Broth: Pour in the vegetable or chicken broth. Bring the mixture to a boil, then reduce the heat to a simmer.
5. Cook Until Tender: Let the soup simmer for approximately 20 minutes, or until the potatoes are tender when pierced with a fork.
6. Blend the Soup: Using an immersion blender, blend the soup until smooth. If you prefer a chunkier texture, only blend part of the soup.
7. Add Cream (Optional): For a creamier texture, stir in the heavy cream and heat for an additional 5 minutes. Season with salt and pepper to taste.
8. Serve: Remove from heat and let cool slightly before serving.

These simple steps ensure a delightful experience in preparing your Leek & Potato Soup.