- Preheat oven to 250 degrees and grease a large baking sheet. 
- Combine sugar, salt, and cinnamon in a small bowl. Set aside. 
- In a large bowl, whip the egg white and vanilla until it gets frothy, about 1 minute. 
- Add almonds to the egg mixture and stir until they're evenly coated. 
- Pour the dry mixture over the almonds and mix together until they're evenly coated. 
- Spread the almonds into an even layer on the baking sheet. Bake for 1 hour, stirring every 15 minutes. 
- Remove the almonds, stir once more, then allow to cool. 
- Store in an airtight container for up to 2 weeks, or in the freeze for up to 3 months.