Heat your oven to 300°F and line a large, rimmed baking sheet with parchment paper, a silicone baking mat or greased foil.
Spread the popcorn onto the prepared baking sheet.
In a small bowl, whisk together the egg white, sugar, salt and lemon extract until foamy. Mix in the lemon zest and poppy seeds. Pour over the popcorn and toss to coat evenly.
Bake 20 minutes, stirring once midway through the baking time. Cool completely before storing in airtight container.
Notes
Note: The use of egg white helps flavors adhere to popcorn, without adding fat through more traditional use of oils.
Recipe by Go Dairy Free at https://www.godairyfree.org/recipes/lemon-poppy-seed-glazed-popcorn