Peel and wash the potatoes. Cook in boiling salted water for 15-20 minutes. Heat up deep-frozen spinach and milk covered for about 15 minutes. Stir from time to time. Peel and slice the onion. Dice bacon finely. Heat the fat.
Brown onion and bacon in it, add to spinach. Season with salt and pepper. Boil up about 1 litre of salted water and vinegar. Let the eggs slide in carefully. Spoon them together and let them simmer for about 5 minutes. Remove with a skimmer. Serve boiled potatoes, spinach and poached eggs in portions garnished with parsley