Boil the beans in boiling salted water for 2 minutes.
Cut the sausage into long pieces and fry with finely chopped garlic in hot oil, stirring occasionally, for 1 minute. Add potatoes cut into 4 parts, shake the pan several times to mix the ingredients. Cook for 1-2 more minutes.
Transfer the contents of the pan to a bowl. Add beans, vinegar, finely chopped parsley, salt. Stir. Divide among plates, top with peeled eggs, cut into 2-4 pieces, and serve immediately.