Making Ketchup...

...out of playdough, to top the sausages, chips, peas, sliced aubergine and carrots. But in practice the dough was too stiff for the piping bag so we cut a little more off the end and called it spaghetti instead!

May I recommend disposable piping bags from Lakeland Ltd.; this one withstood all but the last few squeezes, at which point the dough extruded through a series of holes that appeared where the bag was twisted.