Peel and wash the potatoes, cut them in half lengthwise and cook them in boiling salted water for about 15 minutes. Clean, wash and cut the soup greens into small pieces. Also cook in boiling salted water for about 12 minutes.
Defrost the peas. Peel and chop the onions. Wash the chives and, except for a few tips for garnishing, cut into small rolls. Melt the fat. Add onions and fry until transparent. Sweat flour in it.
Add chicken soup and milk while stirring constantly and bring to the boil. Fold in prepared vegetables, peas and chives. Season everything with salt and pepper and serve garnished with chives.