Preheat the oven to 200 C.
Mix the zucchini and onion slices with a teaspoon of salt in a large bowl and let them sit for 20 minutes.
Rinse the zucchini onion mixture under cold water.
Add the English spinach, thyme, basil and sunflower seeds to the mixture and season with salt and pepper.
Mix the 2 different types of flour with the eggs, oil and water. Then combine the 2 mixtures in one bowl.
It almost looks like that there is not enough dough to cover the zucchini and the spinach. It is suppose to be like that, so don't worry.
Line a small sheet pan with non stick backing paper and pour the thick batter in, creating an even layer.
Sprinkle with parmesan cheese and bake for 25 to 30 minutes.
Decorate with fresh basil before serving (optional).