1 Cut the hard stems off the Brussels sprouts.
2 Using a knfe, make an X in the stem end.
3 In a pan of boiling water, put the sprouts and cook for 3 to 5 minutes.
4 Drain well.
5 In a bowl, add the vinegar, oil, garlic, optional sugar, salt, pepper, and hot sauce, whisk together.
6 Add in the onion and pour over the hot Brussels sprouts while still hot.
7 Allow to marinate for up to 3 or 4 days before serving.