No, omelettes left out overnight are not safe to eat. Cooked eggs should not be left at room temperature for more than two hours, as bacteria can grow rapidly in the "danger zone" between 40°F and 140°F. Consuming an omelette left out overnight increases the risk of foodborne illness. It's best to refrigerate leftovers promptly and reheat them properly before consumption.
No. It is not safe to eat turkey left out overnight in any container.
No. Stew left out overnight would not be safe to eat, covered or not - unless where it was left out was as cold as a refrigerator.
No.
No, it is not safe to eat deli ham that has been left out overnight as it can lead to bacterial growth and foodborne illness.
No, it is not safe to reuse frying oil that has been left out overnight as it can become rancid and develop harmful bacteria.
No, it may not be safe to eat after being left out overnight.
It wouldn't be safe to eat salad that's been left out overnight.
I left a egg custard pie overnight. Is it safe?
No, it is not safe to eat if it has been left out overnight.
It isn't safe to eat any food that has been left out overnight.
Yes, that is safe. Your muffin may get stale, but it is not dangerous to eat after being left out overnight.
No.