Preheat oven to 300°F; line a large baking sheet with parchment or silicone mat.

Whisk egg white and water in a large bowl until frothy but not stiff.

Toss pecans in egg white to coat evenly.

Mix sugar, cinnamon, salt, and nutmeg in a separate bowl; sprinkle over pecans and toss thoroughly to coat each nut.

Spread in a single layer on sheet without too much touching.

Bake 20-25 minutes, stirring every 10 minutes, until golden and fragrant. Pecans remain slightly soft but crisp as they cool.

Remove from oven; immediately separate stuck nuts and cool completely on sheet. Store airtight up to 2 weeks.