Peel and chop the onions. Wash the meat and dab dry. Heat 2 tablespoons of oil in a casserole or roasting pan. Fry the bacon in it until crispy, remove and put aside. Sauté the goulash in portions in hot frying fat all around.
Add the onions and fry briefly.
Put all the meat back into the pot. Add tomato paste and sauté briefly. Dust with flour and sauté briefly. Deglaze with wine and cognac, bring to the boil. Add 750 ml water, bay, juniper berries and allspice and braise covered for about 1 1/2 hours.
Wash, clean and cut the celery into pieces. Clean and peel the carrots and cut them into oblique, longish slices.
Peel and wash the potatoes and cut 600 g potatoes into pieces. Clean, peel and wash the celeriac and cut it into large cubes. Cook the potato and celery pieces in boiling salted water for about 20 minutes.
Slice the remaining potatoes into thin slices. Wash the rosemary, shake dry and chop finely. Heat the remaining oil in a frying pan. Mix the potato slices and rosemary and fry for about 2 minutes until crispy.
Remove from the pan and let it drip off on kitchen paper. Finely chop the chocolate. Add the bacon, carrots, celery, chocolate and jelly to the goulash about 20 minutes before the end of the braising time, finish cooking and season to taste with salt and pepper.
Heat milk and butter in a small pot. Drain the potatoes and celery, add the hot milk and butter mixture and mash with a potato masher. Season with salt, pepper and nutmeg.
Arrange mashed potatoes in a bowl, sprinkle with potato chips and add goulash.