Prep: If using fresh peaches, peel and pit the peaches.
Cook: In a medium saucepan, add the peaches and water, cook over medium-low heat for 5 minutes (fresh peaches) - 10 minutes (frozen peaches).
Vanilla Bean: Meanwhile, cut the vanilla bean pod in half and then slice open lengthwise. Take the back of your knife or spoon and scrape out all of the vanilla bean, reserve a big pinch.
Add Spices: right before the peaches are done cooking, add in the vanilla and nutmeg (or any other spices you prefer) and stir until incorporated. Cook for 1 more minute.
Transfer: Using a slotted spoon, transfer the peaches to a blender or food processor, leaving all excess water in the saucepan. You do not want to add any additional liquids or the puree might be too thin.
Blend: starting on low and increasing to high speed, puree the peaches until smooth and creamy.
Eat: serve to baby or freeze for later.