Onions peel and cut into eighths. Heat the oil in a frying pan. Sauté the goulash in it. Season with salt and pepper. Add red wine, stock and bay leaf. Bring everything to the boil, cover and cook for about 1 1/4 hours.
Peel, wash and dice the potatoes. Chop the tomatoes in the tin. Peppers clean, wash and dice. Drain the beans. Add tomatoes, beans, peppers and potatoes to the goulash about 20 minutes before the end of the cooking time.
Stir in the sauce thickener, bring to the boil again. Season to taste with salt, pepper and Tabasco.