Beat egg whites with a whisk for one minute until frothy. Add sugar, vanilla extract, ground cinnamon, and kosher salt. Beat again until combined. Fold in pecan halves until completely coated.
Line a 15x10x1 inch baking sheet with parchment paper. Pour the coated pecans onto the parchment in a single layer. Bake in a 225°F oven for 60 minutes, stirring every 15 minutes to ensure even cooking.
Remove pecans from the oven and allow them to cool completely on the baking sheet before enjoying.
Notes
Store candied pecans in an airtight container at room temperature for up to one month. If sticky, it may be due to insufficient cooking time or high humidity.