Grate the zucchini, Salt it, and leave it for 10 minutes. Then squeeze the liquid. Clean carrot and onion and grate finely. In a bowl, mix the onion, carrot, zucchini, fennel. Add the egg. Pour 2 tbsp flour to get not very liquid batter. If necessary, add more flour. Mash the feta cheese with a fork and add to the dough. Preheat the oven to 180C degrees. Pad the tray with baking paper. Put a spoonful of the mixture in the pan off. Bake 25 minutes until golden. Prepare sauce mash garlic, salt, yogurt and sunflower oil.