I've got to go and do the school run in a bit.
Going to cook some potato bake for the kids tea, but we're in a rush when I get back to eat tea and got to out again so not very long to get back, wait for oven to heat up, 50 minutes to cook the potato bake and then time for kids to eat it.
I never go out and leave the oven on, but would I be unreasonable to put it in the oven just before I go out, so that it will be more or less ready for when we get back or is this dangerous?