I've never run across this standard till now. What is 140F degrees? Is that the temperature required for temporary holding of a meal that's just been cooked (perhaps under IR "hot lights) waiting for delivery to a customer's restaurant table? The only figures I'm familiar with are internal meat thermometer temps for various degrees of doneness, or most microwaveable frozen foods that recommend cooking to at least 165.
Eric
Commercial cooked food storage, like steam tables and IR lamps must be at least 140 degrees to prevent bacterial growth. That's a pretty universal Department of Health rule.
Cooking foods to 165 is fine if you like your food to be destroyed during cooking. If you grind your own beef, you can make hamburgers rare at 130 degrees.
You should check out sous vide cooking. You would be surprised to find that many foods, even pork, can be perfectly cooked at 140 to 145 degrees, depending on how you like it, and be safe to eat. In fact, a pork chop cooked sous vide at 140 degF is absolutely delicious and as juicy as a beef steak.
Poultry can be cooked at 140 degrees also. Many fish are cooked to 118-120 degrees sous vide, terrific NY strip or ribeye steak at 130 degrees and prime rib at 125 degrees. Get updated on modern cooking! 😁 .
Microwave ovens are fine for reheating left-overs, but not for cooking if you like good food. Even for re-heating leftovers, you should resist the urge to use a microwave on high--it will ruin otherwise good left-overs. USE MEDIUM or Med-LOW for reheating and it will actually have a good taste and texture. HIGH ruins food.
If you must cook something fast, check out the Viking TurboChef residential ovens. They are wonderful.