Potatoes, beets and carrots need to be boiled "in uniform" and this can and should be done in advance. Peel the vegetables.
All the vegetables and slice the Apple very finely in a salad. It tastes good. Red onion, finely chop and pour cold water to the bitterness went away the excess, allow to stand for 15 minutes, until we cut other products. In the salad bowl put the chopped cucumber, parsley, Apple. The Apple is always cut with a ceramic knife, it remains so long without darkening. Yes, all in all vinaigrettes and salads try cutting vegetables with a ceramic knife, they are not oxidized. Spread the red onion, thrown back on a strainer to merge the water with him. Pour sunflower oil 1 St l, stir and spread the peas, pre-draining it with liquid.