Preheat the oven to 300 degrees. Prepare a baking sheet with a silicone baking mat or parchment paper and set aside for now.
In a small bowl, mix together the sweetener, cinnamon, and salt. Set aside for now.
Add the egg white, water, and vanilla to a large bowl. Whisk it until it’s frothy.
Stir the pecans into egg mixture in the large bowl, being sure to stir them around well and get all the nuts coated.
Add the cinnamon sweetener mixture to the large bowl, tossing the pecans well to make sure they are all fully coated.
Spread the pecans on the baking sheet in a single layer. Place them in the oven.
Bake at 300 degrees for about 30-40 minutes, stirring after the first 15 minutes, then again after another 10 minutes, then every 5 minutes thereafter. When done, the pecans will no longer be wet with the egg white mixture, and they will be a deep golden brown color.
Let cool on the baking sheet, then remove and store in a jar, airtight container, or zip top bag. For best quality, enjoy within 2-3 weeks.