Analysis of information sources in references of the Wikipedia article "Leftovers" in English language version.
Fried rice and noodle dishes with vegetables are likewise ancient. They were typically composed of leftover ingriedents and cooked in woks.
If a food has been out of the refrigerator for more than two hours, then it is considered unsafe and should be thrown out.
Perishable food should never be left out of refrigeration more than 2 hours. This is true even if there are no meat products on the pizza. Foodborne bacteria that may be present on these foods grow fastest in the "Danger Zone" (temperatures between 40 and 140 °F) and can double in number every 20 minutes.
If a food has been out of the refrigerator for more than two hours, then it is considered unsafe and should be thrown out.