In a dish separate egg white from yolk and allow egg white to come to room temperature. Discard the yolk.
Preheat oven to 275 degrees.
Line a large sheet pan with parchment paper.
Add egg white, water and vanilla to a stand mixer or using a hand mixer beat on high until soft peaks form.
In a separate large bowl combine sugars, cinnamon and salt. Mix.
Toss the pecans in the egg white mixture. Ensuring each pecan is fully coated.
Add the wet pecans to the bowl with the cinnamon, sugar and salt mixture. Toss.
Place in a single layer on the lined sheet pan.
Bake for 45 minutes, tossing the pecans every 15 minutes.
Let pecans rest on the sheet pan for 1 hour to come to room temperature before storing. Or serve warm.