Grate the zucchinis. Dice the onion and add to the zucchini. Cut the peppers into rings and add to the zucchini. Chop the parsley and spinach leaves not so finely. Cut 250 gr. Muratbey Naturena Herban cheese into pieces and also add them. Add corn flour and 3 tablespoons of flour. Add 2 tablespoons of strained yogurt. Add black pepper, salt and 3 eggs and mix well. Place the mixture into a glass container and place Muratbey Naturena Herban cheese slices on top. Bake at 150 Celsius degrees.