Preheat oven to 250 degrees.
Crack egg white into a small mixing bowl.
Whip egg white until soft peaks form.
Mix in vanilla.
Mix in pecans.
Mix in sugar and cinnamon.
Spread pecans evenly over a baking sheet.
Bake for 40 minutes, stirring every 15 minutes. (15, stir. 15, stir. 10, done.)