2 big red onions, halved and thinly sliced
250ml white vinegar
3 tbsp cane sugar
1 tsp coriander seeds
Salt and Pepper
Poor the vinegar, coriander seeds, sugar, salt and pepper into a pot and turn up the heat and when the mixture is boiling and the sugar is dissolved.
Place the onion in a jar and poor the vinegar mixture over and close it tight and place in the fridge.