In a high-speed blender or food processor, combine your frozen peach slices (or fresh, peeled peaches), granulated sugar, cold water, and freshly squeezed lemon juice. Blend on high until the mixture is completely smooth, about 1 to 2 minutes.

Once blended, pour the peach mixture into a metal loaf pan or a freezer-safe container. Spread it evenly to avoid air pockets.

Place the container in the freezer and allow the peach sorbet to freeze for at least 4 hours, preferably overnight.

Remove from the freezer and let it sit at room temperature for about 5 minutes before serving.

Using an ice cream scoop or a sturdy spoon, scoop the sorbet into chilled bowls and serve.