This refreshing cold cucumber yoghurt soup can be found throughout Bulgaria in the summer months. Mixed with plenty of dill and topped with some toasted walnuts and a drizzle of olive oil, it's the perfect dish to take the edge off of a hot day.
Add the cucumbers to a large mixing bowl and season generously with salt. Add the garlic and dill and stir to combine.
Add the yoghurt and 400ml (1⅔ cups) water and stir until thoroughly combined. Taste to adjust for seasoning, adding more salt and freshly ground pepper if needed. Transfer to the refrigerator for at least 1 hour.
Preheat oven to 180°C/350°F. Add the walnuts to a large baking tray and toast for 6-8 minutes, or until golden and very fragrant. Set aside.
After the soup has chilled, add more water - a few tablespoons at a time - if needed to achieve the desired consistency. Taste to adjust for seasoning, adding more salt, if needed. Serve the tarator, drizzling with olive oil and topping with the toasted walnuts.