Cut zucchini, potato and onion cubes. Put in lightly salted cold water, add the stems of parsley and put on kotolna to boil for about 20 minutes. Remove from heat, add the cottage cheese and blend to a smooth mixture. Returns to the heat, add the milk, salt and pepper to taste. Green peppers cut into strips and fry in melted butter, so that they remain slightly crunchy. Add pepper to the pan. Mix and transfer the pan. When serving sprinkle with fresh parsley. When you use cottage cheese, better choose desalinated. Extremely helpful and dietetic food, especially for people with high blood pressure. The presence of a potato will help to thicken the soup without flour used. If you do not have green pepper you can replace it with fresh onion, the aim in both cases is the fresh taste.