1. Combine the peaches, sugar, lemon juice, and salt in a food processor; process until smooth.
2. Pour the mixture into an ice cream machine. Process according to the manufacturer’s instructions. Transfer to a freezer-safe container and place a piece of parchment paper directly on the surface of the sorbet. Wrap in plastic wrap and freeze for 4 hours or up to overnight before serving. The sorbet will keep in the freezer for up to 1 week.