Peel and chop the onions. Clean, wash and cut the peppers into pieces. Clean the mushrooms, possibly wash and cut in half or quarters
Dab dry goulash, dice smaller if necessary. Heat the oil in an ovenproof roaster. Brown the meat all around in portions. Add onions, mushrooms and paprika and fry for about 3 minutes, turning the meat. Season to taste. Stir in tomato paste. Dust with flour and sweat everything. Deglaze with broth, bring to the boil
Cover and braise in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2) for about 1 1/2 hours. Season to taste
Debark and crumble the toast. Mix sour cream and cheese. Spread everything on the goulash. Bake open at 225 °C (fan oven: 200 °C/gas: level 4) for 15-20 minutes. Goes well with boiled potatoes