I've often wondered why the instructions on ready meals say to pre-heat the oven.
Why not just stick the ready meal in when you turn the oven on?
It takes 5 mins for the oven to get up to speed, so just add five mins to the cooking time.
It saves making two trips to the kitchen - one to turn the oven on, and again to stick the meal in.
By cutting the number of trips in half, you get more reading time - so this is a relevant topic here.
Is there any advantage to pre-heating?
