Peel onions and garlic. Dice onions and chop garlic finely. Dab beef goulash dry. Heat the lard in a casserole dish and fry the meat in it in 2-3 portions until well browned.
Season with salt and pepper and add the whole goulash again. Finally add onions and garlic and stir-fry for about 5 minutes.
Deglaze everything with 1⁄2 l water and beer, bring to the boil and simmer for about 5 minutes. Season with salt, pepper and 2 tablespoons of sugar. Spread the bread with mustard and put it on the goulash with the mustard side down.
Everything covered 1 1⁄2-1 3⁄4 Stew for hours until the goulash falls apart easily.
In the meantime peel and wash the potatoes and cut them into thick chips. Dab dry well with a tea towel. Heat the oil in a wide pot or deep fryer to about 150 °C. Pre-fried the French fries in it in portions for about 4 minutes.
Drain on kitchen paper.
Stir the finished goulash again and season with vinegar, salt, pepper and sugar. Heat frying oil to approx. 170 °C. Fry the pre-fried French fries in this oil for 3-5 minutes until crispy.
Drain on kitchen paper. Season with sea salt. Arrange goulash and chips.