Marinate the onion. Peel the onion and cut into small cubes. Pour boiling water over the onion. Add wine vinegar and a pinch of sugar. Cover the bowl with a lid and set aside. After cooling, drain the water, cool the onion.
Prepare pre-boiled and chilled vegetables. Peel the fresh cucumber and cut into small cubes.
Grate the pickled cucumbers and the peeled apple on a coarse grater.
Boiled and peeled eggs cut into small cubes.
I pre-cut the boiled sausage into slices and lower it into boiling water. Stir, remove quickly and cool. This is optional. Cut the sausage into cubes.
Put the prepared products in a large bowl and add finely chopped green onions and canned peas.