01 - Place a large soup pot over medium heat. Add the chopped turkey bacon and cook until crispy and browned, approximately 5-7 minutes. Remove using a slotted spoon and drain on paper towels. Reserve the bacon drippings in the pot.
02 - Add butter to the pot with the reserved drippings. Once melted, add leeks, onion, and garlic. Cook over medium heat, stirring occasionally, until vegetables are softened and fragrant, about 5 minutes. Avoid browning.
03 - Add the diced potatoes to the pot. Stir gently to combine with the aromatics. Cook for 3 minutes to lightly coat the potatoes, allowing them to absorb the flavors.
04 - Pour in the chicken broth and water. Increase heat to bring the mixture to a boil, then reduce to low heat. Cover and simmer until potatoes are completely tender when pierced with a fork, approximately 15-18 minutes.
05 - Remove the pot from heat. Using an immersion blender, purée the soup directly in the pot until completely smooth and creamy. Alternatively, transfer the soup to a countertop blender in batches, blending until smooth. Return the puréed soup to the pot if using a countertop blender.
06 - Place the pot over low heat. Stir in heavy cream, salt, pepper, and nutmeg. Heat gently for 3-4 minutes, stirring frequently, until the soup is heated through. Do not allow the soup to boil.
07 - Ladle the hot soup into individual serving bowls. Top each portion generously with the reserved crispy turkey bacon. Sprinkle fresh chives over the top as a finishing garnish. Serve immediately.