We all know that olive oil is good for you, but it's easy to get stuck in the salad dressing rut. Here are a few really simple ideas for how to use olive oil as a 'finishing oil' to flavour your food. Of course when olive oil is being used as a principal ingredient, ideally you should use the best you can afford. 1. Bruschetta Good old bread. The 'comfortable slippers' of food. Slice up some crusty bread and toast…