Preheat oven to 180C/350F.
Grate the zucchini and place into a large colander. Sprinkle with ¼ tsp salt, toss with your fingers and leave to sweat for 30 minutes.
Working a handful at a time, squeeze out the excess water (as much as you can) and place the zucchini in a bowl.
Add the Batter ingredients (except oil spray) and mix to combine.
Spray 2 baking trays with oil. Dollop heaped tablespoons onto the trays, then use your fingers to shape them into cylinder "tater-tot / potato gem" shapes.
Spray with oil. Bake for 25 minutes, swapping the trays at around 20 minutes, or until golden brown and a crunchy crust forms on the surface.
Serve with lemon wedges and Tzatziki, if using.
Mix together ingredients and set aside for at least 10 minutes before serving.
