Food Safety – Is a Baked Apple That Was Left Out Overnight Safe to Eat?

I'd say it depends. If you are dead-set on observing all food safety rules, the pizzas are probably unsafe to eat. But in the real world, it is possible to bend some of those rules and get by unscathed. But you have to be smart about it--not all rules safely bend as far as others.

What was on the pizzas? Shrimp? Chicken? Raw sausage? Those things have a pretty short safety window. Cured meats like pepperoni are safer longer (that's why they're cured in the first place).

How hot was your kitchen?

How long did they sit out?

And then of course it comes down also to how long and how hot you're cooking things. You might well be able to kill off germs in things that aren't outright spoiled. Pizza isn't that long-cooking, so there's risk there.

Ultimately, you have to be the arbiter of safety. Check the USDA website about food safety and follow every rule if you want to feel certain.

I once left a whole New York strip in the walk in cooler for two weeks and it was great. Chances are that the salt and acid in the marinade preserved the pork well enough it would still be safe to eat after six days. I would check for slime and foul odor. There are several other factors involved such as how it was handled before put in the refrigerator. For example, a piece of pork that was at room temp for one hour with a semi sterile knife trimming it might not last three days. I always go with whether it has an off odor or not. I find that meat which has aged a little in the fridge will have a more robust defined flavor. If you run your finger across it and feel any type of slime just get rid of it.