Wash the potatoes and cook in boiling salted water for about 20 minutes. Wash and clean the cauliflower, carrots and beans. Divide cauliflower into florets, cut carrots into slices. Cook together with the beans in salted water for about 15 minutes.
Pour off the vegetables and collect the vegetable water.Measure 100 ml of cooking water, bring to the boil and thicken with sauce thickener. Add lemon juice and sour cream. Wash and dry the meat, dust with flour and fry in hot oil for about 2 minutes on each side.
Drain the potatoes, rinse and peel them. Arrange the vegetables, meat and potatoes on a plate, pour the sauce over them and serve sprinkled with parsley and pepper.