Kefir Okroshka with Mineral Water

Boil the potatoes in their skins, let them cool, peel, and dice.

Hard-boil the eggs (bring to a boil for 1 minute, then reduce heat and simmer for 8 minutes), cool them in cold water, and dice.

Dice the cooked bologna and cucumber, and cut the radishes into cubes or half-moons.

Finely chop the green onions and dill, and combine all the ingredients in a large pot.

Whisk the kefir together with the mineral water and stir in the mustard.

Pour the prepared kefir mixture over the okroshka, stir well, and season with salt to taste.