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Do you really need to pre-heat the oven?
(www.youtube.com)
Many people chuck it in the oven without pre-heating. Do companies factor that in when writing the instructions?
Chris does a test using a meat thermometer, and notices that ignoring the preheated instructions on chicken seems to give a better cook.
He compares food safety standards between UK and US, and there's an option to cook chicken in 10 minutes on a 5 minute pre-heated oven