Peel onions and cut them into rings. Heat the oil in a pot. Fry the onions in it until golden brown. Dust with flour, add wine and stock while stirring, bring to the boil and simmer for about 10 minutes. Wash the marjoram, pluck the leaves from the stalks and chop them a little if necessary.
Add cream, 150 g cheese and marjoram. Season to taste with mustard, salt and pepper. Sprinkle some cheese over the soup. Add the rest extra. Puff pastry sticks taste good with it