Peel, wash and halve the potatoes. Boil potatoes in boiling salted water for about 25 minutes until soft. Cut the sausages into pieces. Peel onion and chop finely. Drain the corn in a sieve.
Wash and clean spring onions and cut them into slanted rings. Heat the oil in a frying pan. Fry the sausages all around. Dust with flour and mix briefly. Add beer and stock while stirring and let simmer for about 10 minutes while stirring occasionally.
Season with salt, pepper, ketchup and a little sugar. Add corn and spring onions at the end. Bring milk and butter to the boil. Drain the potatoes. Add the milk and mash the potatoes. Season the puree with salt and nutmeg.
Arrange puree and goulash.