Mix all the ingredients and serve cold in a soup dish. Use enough water so the soup is about the consistency of milk. Add a couple ice cubes if it's not cold.
If you use all of the above ingredients without the water and strain the yogurt until it becomes half in volume, you can make a salad. It is referred to as "Snezhanka" (Snow White) or mlechna salata (yogurt salad). The main difference is that people traditionally use pickles/gherkins for Snezhanka and fresh cucumbers for Mlechna Salata.