Contrary to popular belief, you can reheat food more than once – whether you use a microwave, over the stove or otherwise. The general rule of thumb is to reheat food until it’s piping hot, ensuring all the bacteria that may have developed is destroyed.
But with that being said, prevention is always better than the cure – in this case, making sure you have good food handling practices. When it comes to storing food – whether it’s been reheated or freshly cooked – it’s important to not let it sit on the countertop for too long. The slower you refrigerate your food, the greater the chance that undesirable bacteria will develop.
Bacteria’s prime temperature for growth is between 5-60 degrees Celsius and has a particular liking for dishes with cooked rice, pasta, eggs, meat and other proteins. So, make sure your hot food is hot, and get your leftovers into the refrigerator as soon as possible1.