SERVES 6 PREP 45 mins plus at least 1 hr 30 mins steeping COOK 1 hr MORE EFFORT
500g boerewors sausage
6 brioche hot dog buns
American mustard, to serve (optional)
For the lager onions
2 tbsp rapeseed oil300g white onion,1 tsp garlic purée5g thyme, leaves picked2 bay leaves50g caster sugar2 tbsp malt vinegar100ml lager