At the exact time I was ladelling my homemade marmalade into sterilized jars I heard Ready, Steady, Cook in the background. One of the guest chefs had blueberries in her mystery bag and she decided to make blueberry jam in the microwave in ten minutes. Okay then. She also made a passing comment that went something like this; "in this day and age there is no other way you would ever consider making jam other than in the microwave". Funny how she happened to say that at the very moment I had…