This recipe is just a guide - use whichever vegetables you have to hand and dressing quantities that suit your taste.  This is a great way to use up those winter veg that might otherwise hang around in the fridge too long, and keeps well in the fridge for a couple of days.  Eating them raw makes a refreshing change, too.  The rainbow colours are pretty, and the salad looks stunning served in a bowl lined with the beautiful outer leaves of a large January King cabbage, which are sea green fringed with purple.