Preheat your oven to 400°F and line a baking sheet with parchment paper.
Grate the zucchini and measure 1 ½ cups before squeezing.
Toss it with ½ teaspoon of salt and let it sit for about 10 minutes to help draw out the moisture, then squeeze it extremely well with a clean kitchen towel or paper towels until as much liquid as possible has been removed.
Add the squeezed zucchini to a bowl with the eggs, mozzarella, Parmesan, almond flour, garlic powder, onion powder, paprika, salt, and pepper.
Mix until well combined, let the mixture rest for 3–5 minutes, then divide into 4 sandwich rounds. You may need two sheet pans.
Bake for 22-28 minutes, carefully flipping, halfway through until golden brown and set.
Let cool COMPLETELY before filling with your favorite sandwich ingredients.
