Creamy Potato and Leek Knödelsuppe with Chives

**Prepare the Knödel:** In a large bowl, combine bread crumbs, flour, egg, chopped parsley, a pinch of nutmeg (if using), salt, and pepper. Gradually add milk, mixing until a soft dough forms. The dough should be moist but not sticky. If it's too wet, add a little more breadcrumbs; if too dry, add a bit more milk.

Cover the bowl and let the Knödel dough rest for at least 30 minutes. This allows the breadcrumbs to absorb the moisture.

Bring a large pot of salted water to a simmer. While the water is heating, lightly flour your hands. Form the Knödel dough into small balls, about 1-inch in diameter. You should get about 12-16 Knödel.

Gently drop the Knödel into the simmering water, working in batches to avoid overcrowding the pot. Let them cook for about 12-15 minutes, or until they float to the surface and are cooked through. Test one by cutting it open to ensure it is not doughy in the middle.

Remove the Knödel with a slotted spoon and set aside to drain on a plate lined with paper towels.

**Prepare the Soup:** In a large pot, melt butter and olive oil over medium heat. Add the sliced leeks and sauté for 8-10 minutes, or until they are softened and translucent. Be careful not to brown them.

Add the cubed potatoes to the pot and stir to coat them with the butter and leeks. Season with salt and pepper.

Pour in the vegetable broth. Bring the soup to a boil, then reduce the heat and simmer for 20-25 minutes, or until the potatoes are very tender and easily pierced with a fork.

Remove the pot from the heat and carefully blend the soup using an immersion blender or transfer it in batches to a regular blender. Blend until smooth and creamy. Be cautious when blending hot liquids, as they can splatter.

Return the blended soup to the pot and gently reheat over low heat. Stir in the heavy cream (if using) and adjust seasoning to taste.

**Assemble and Serve:** Ladle the creamy potato and leek soup into bowls. Add 3-4 Knödel to each bowl.

Garnish generously with fresh chopped chives and serve immediately.