For the curry sauce, peel and finely dice the onion. Heat the butter and fry the onion for about 5 minutes. Sprinkle with sugar and caramelise briefly. Sprinkle with 2 tbsp.
curry powder and fry. Add tomatoes, bring to the boil and boil down for about 20 minutes while stirring. Finely dice the cucumbers. Add cucumbers, ketchup and stock to the sauce, bring to the boil and season to taste with Sambal Oelek, vinegar and salt
Heat the oil in a pan and fry the sausages for about 8 minutes while turning. Fry the chips in portions in hot frying fat. Cut the sausages into slices. Arrange sausages, chips and sauce and sprinkle with curry powder