Grate the zucchini
Use the wide holes on a box grater or a food-processor shredding disc. Keep the zucchini nub as your handle if you like ergonomic grating.
Salt & drain
Toss the grated zucchini in a colander with 1 heaping tsp kosher salt. Let it drain at least 10 minutes (up to a few hours). This draws out the liquid and concentrates flavor.
Make flax “eggs”
Mix 2 tbsp flaxseed meal with 4 tbsp warm water. Whisk and set aside for 10 minutes to thicken.
Mix dry herbs & crumbs
In a big bowl combine dill, mint, scallions, cumin, nutmeg, ½ tsp kosher salt, lots of cracked pepper, flour, panko, and vegan feta. Stir to combine.
Squeeze the zucchini (arm workout, but necessary)
Put the drained zucchini in a nut milk bag or kitchen towel and squeeze over a bowl until you expel most of the water. You may get 360–400 mL of zucchini water for 1½ lb — yes, that much. Repeat squeezing in sections to be thorough.
Finish the batter
Add the gelled flax mixture to the herb-flour mix. Break up the squeezed zucchini and fold it in with your hands until you can compress the mixture into compact patties. Don’t overmix — otherwise the zucchini releases more water.
Shape the fritters
Scoop ~2 tbsp (25–30 g) portions and compact tightly. Flatten to ~½ inch (1 cm) thick. For smooth edges, cup and rotate each patty to seal.