Balsamic Reduction is used as an accompaniment to steak, fish, roast vegetables but it is just as delicious to eat by the spoonful. All you do is heat the balsamic vinegar until the sugar caramelises and reduces to a syrup. You can keep it in a squeezy jar in the fridge for a month at least. Don't use the best aged balsamic from Modena for this: use the cheaper balsamics you find at the supermarket.
Blue cheese and mustard dressing
Handy dressing combining the strong flavours of blue cheese, mustard, cider vinegar and garlic, tempered by yogurt - suits pear salads or salads served with burgers or steaks.