Preheat oven to 250 and line a large rimmed baking tray with parchment paper.
In a large bowl combine egg white and water. Whisk until bubbly and frothy.Add vanilla extract, sugar, cinnamon and salt. Whisk to combine.
Toss pecans into sugar and egg white mixture until all the nuts are evenly coated. Pour onto the baking tray, spreading out into an even layer. Bake at 250 for about an hour. Stir every 15 minutes or so. Pecans are done when the feel dry to the touch and the sugar is crunchy. Careful not to let the pecans brown too much. Allow to cool before storing in an air-tight container.