Preheat the oven to 425°F. Line two baking sheets with parchment paper.
Cut zucchini into spears and lay on several layers of paper towels. Sprinkle the zucchini spears with salt and top with several more layers of paper towels. Allow the zucchini to sit on the paper towels for 10-15 minutes, pressing down lightly occasionally to absorb as much moisture as possible.
2 zucchini, cut into 2-inch spears
In a medium sized shallow bowl, combine the Panko, parmesan, salt, garlic powder, and pepper. Stir to combine.
1 cup seasoned Panko breadcrumbs, ½ cup grated parmesan cheese, 1 teaspoon salt, ½ teaspoon black pepper, ½ teaspoon garlic powder
In a separate shallow bowl, place the egg whites. Whisk until frothy.
2 egg whites
Work with one spear at a time, place it in the egg white, flipping it to make sure it is fully coated. Transfer it to the bowl with the breadcrumbs and, using a fork, carefully coat the spear with the breadcrumb mixture. Transfer to the prepared baking sheet. Repeat with remaining spears.
Bake in the preheated oven for 15-17 minutes, or until golden brown and crispy.