6-8 Pork & leek sausages, good quality butchers
6-8 hot dog buns
4 large red onions
2 tbsp balsamic vinegar
Pinch of sugar
1-2 tbsp butter
Dijon mustard
150g grated cheese, plus extra
2 spring onions, finely sliced
1-2 red chillies, deseeded and finely sliced