Start preparing the dough for the zucchini casserole. Place the well-squeezed zucchini in a bowl. Add the greens and sour cream. Crumble the feta cheese and beat in the eggs. Mix all the ingredients thoroughly. Season with pepper, add flour and mix again. The mixture should be thick. Since the cheese is salty, there is no need to add salt to the casserole itself.
Place the zucchini casserole in the oven. Grease the pan with vegetable oil. Spread the zucchini mixture, level the surface. Place the zucchini casserole in the oven for 30-40 minutes at 180 degrees until golden brown.
Prepare the sauce. Add garlic, salt and chopped dill to the Greek yogurt. Mix everything together and refrigerate for 10 minutes.