For the Danish tartar sauce, pour mixed pickles into a sieve, collecting approx. 3 tbsp. of the brew. Chop the mixed pickles finely. Wash the dill, shake dry, pluck flags from the stalks and chop finely.
Mix mayo, collected brew, curry powder, mixed pickles and dill. Season with salt, pepper and sugar.
Heat water in a pot (but do not boil!). Let the sausages steep in it for 3-4 minutes. Cut the bread roll lengthwise, but not through. First add sausages, then cucumber salad to the roll.
Spread the remoulade on top and sprinkle with roasted onions.