I have been asked by young cooks ,and let me say I am new to cooking too with some exprenicene . Here is what I have to explain...it's for simmering . It says liquid not boil but be bought to just below boiling point slowly and steadly over gentle heat. So don't boil first gradually increase heat till simmer. How do I explain simple enough gradually increase till simmer? Would it be ok to say start at low and if doesn't simmer there increase heat to medium low and see if simmers there. Or is there a better way to explain this?