To make the Onion and Fig Jam, heat the olive oil in a large pan and tip in the red onions, then cook for 10 minutes until softened, stirring occasionally.
Stir in the figs, balsamic vinegar, soy sauce, red wine or port and sugar until well combined. Sauté for another 5 minutes, tossing occasionally.
Sprinkle over a tablespoon of water, then reduce the temperature and cook gently for 25-30 minutes. The onions should make a soft, sticky, sweet and sour jam.
Season to taste and leave to cool. Transfer to a bowl, then cover with clingfilm and chill until needed.
At least a half-an-hour before you are ready to serve, remove all the cheeses from the fridge and their packaging. Arrange on a wooden board with a bowl of the onion and fig jam and oat biscuits and small mounds of the grapes.
Hand around plates to each guest and allow people to help themselves.
Top Tip: Ideally, the ultimate cheeseboard should contain a cheese from one of each of the main styles (see suggestions above). However, you can also just serve one good cheese in perfect condition with excellent impact. It can also be a good idea to introduce a cheese that many of your guests have never tried before.