01 - Place a large soup pot over medium heat. Add the chopped turkey bacon and cook until crisp and browned, about 5-7 minutes. Remove using a slotted spoon and transfer to paper towels to drain. Set aside for garnish.
02 - In the same pot with the bacon drippings, melt the butter over medium heat. Add the sliced leeks, chopped onion, and minced garlic. Cook, stirring occasionally, until softened and fragrant, about 5 minutes. The leeks should be translucent but not browned.
03 - Add the diced potatoes to the pot and stir gently to combine with the aromatics. Cook for 3 minutes, allowing the potatoes to begin softening and absorbing the flavors.
04 - Pour in the chicken broth and water. Increase heat to bring the mixture to a boil, then reduce to low heat. Simmer uncovered until the potatoes are completely tender when pierced with a fork, about 15 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 and blend until smooth, returning each batch to the pot.
06 - Return the pot to low heat. Stir in the heavy cream, salt, black pepper, and nutmeg. Heat gently for 3-4 minutes, stirring occasionally, until warmed through. Do not allow the soup to boil.
07 - Ladle the hot soup into serving bowls. Top each portion with the crispy turkey bacon and sprinkle with fresh chopped chives. Serve immediately while hot.