Gather all ingredients. Preheat the oven to 225 degrees F (105 degrees C). Lightly grease a rimmed baking pan.
Combine egg white and water in a mixing bowl; beat until fluffy. Fold in pecans to coat evenly.
Combine sugar, cinnamon, and salt in a shaker or cup with a lid. Dust pecans evenly with sugar mixture, then spread onto the prepared pan.
Bake in the preheated oven, stirring every 15 minutes, until toasted and fragrant, about 1 hour. Cool pecans on the pan, then store in an airtight container.