Boil the vinegar and sugar together until the sugar is totally dissolved. Add 30ml of water to thin the solution, add salt to taste. Make a brine of coriander oil and pickle liquid by whisking them together at a 50/50 ratio.
Brine the cauliflower inside the liquid for 10-15 hrs.
Take the cauliflower out and sear it in a pan with coconut oil and finish it inside the oven until soft (7 min approx.)