- In a small saucepan, make a marinade by combining the water, sugar and vinegar, and bringing to a boil. Season with salt and pepper, and add the red onions. The onion marinade should ideally be prepared in advance. It will keep for several days in the refrigerator.
- For the salad, mix the yogurt and lemon juice in a medium bowl. Add olive oil and garlic to taste. Season with salt and pepper.
- Add the cucumber and mix well. Finish with the marinated onions and freshly chopped dill (with or without mint). Season as needed.