Whisk the egg white in a cup. Pour the egg whites over the nuts, stirring until the nuts are coated with egg white.
In a small bowl, stir the cinnamon + sugar + and salt together. Stir in the vanilla. Add the cinnamon sugar mixture to the nuts, a little a time, while stirring.
Spread the coated nuts on an ungreased baking sheet.
This step is optional, but I’ve found that it makes a world of difference:
After spreading the nuts on the silpat, or parchment paper, sprinkle an additional ¼ cup of granulated sugar over the nuts. Don’t stir – just sprinkle the sugar over the top. Place in the pre-heated oven.
Bake for 20 minutes without stirring, or stir only once or twice. Use a spatula to remove the nuts from the hot baking sheet immediately. If you use a Silpat, the nuts can cool on the silpat.
Allow to cool thoroughly before storing in tightly closed container.