In a bowl, beat egg whites and water until frothy. Add nuts; stir gently to coat. Combine sugar, pie spice and salt; add to nut mixture and stir gently to coat. Fold in raisins. Spread into two greased 15x10x1-in. baking pans.
Bake, uncovered, at 300° for 20-25 minutes or until lightly browned, stirring every 10 minutes. Cool. Store in an airtight container.