Okroshka - Cold Summer Soup

Last summer I went on a trip to Ukraine and discovered this delicious fresh soup.

And it's sooo easy to make.

3 medium potatoes, 4 eggs, 3 - 4 medium cucumbers, 1 bunch radishes, 2 green onions, 1 bunch fresh dill, 1 mint sprig
Buttermilk Base: 2 tsp mustard, 1 L buttermilk, juice from 1 lemon, salt and pepper to taste

Cook potatoes by baking or boiling them. Let the potatoes cool down, then peel and finely chop them.
Boil eggs and peel them. Chop them and add them to the bowl with potatoes. Then dice the cucumbers, radishes, green onion and herbs. Mix well and season with salt and pepper.
Prepare the base for Okroshka by combining all the buttermilk base ingredients in the food processor or blender. Put the mixture into the fridge for at least 30 minutes.
Divide the chopped vegetables between the serving plates and pour the buttermilk base on top.