I have a microwavable meal which instructs me to (for a 800 Watt microwave oven) perforate film and cook for 3 minutes on full power, then remove the film and cook for a further 1 1/2 minutes.
Unfortunately I don't have a microwave.
How do I convert these instructions so I can cook my food in a normal (no fan) oven?
How long should I cook for?
What (UK gas mark 0-9) oven setting should I use?