sentence: cut the onions into thin slices sentence: add butter to hot pan little veggie oil 1  tbsp brown sugar and place onion slices on pan to caramelize sentence: add wine to the pan to cover onions and wrap pan with aluminium foil and let cook 5-6 min sentence: oil the sausages and place them on a griddle pan sentence: add little thyme and grated nutmeg sentence: grate little orange zest into the pan sentence: slice open the buns and place the sausages between them sentence: now put the caramelized onions between the buns squeeze mustard over it to serve