No, the onions would not be safe to eat. You should never eat any food that has been left sitting out for 48 hours.
As long as the food was cooked properly the first time and proper storage precautions were observed, then there is no set temperature that must be reached in order to safely reheat it. Warm to whichever temperature you desire in order to enjoy it.
No, the internal temperature of a whole turkey should reach 165 degrees F.
No. You are not crazy. Potentially hazardous food should not be left unrefrigerated for more than 2 hours. At that point, it should be reheated or placed in the refrigerator.
If the rice has been handled properly throughout the process - cooked, then promptly frozen, defrosted properly and reheated thoroughly - it should not be dangerous to eat.
Yes, you can safely freeze soup that contains cooked ham.
You can keep cooked chicken safely in the fridge for 3-4 days. And frozen for almost indefinately.
Yes, you can safely freeze cooked fish.
The temperature for cooking and holding hot complex vegetables to ensure safe from harmful bacteria is 135 degrees Fahrenheit.
You can safely freeze sausage before or after it is cooked.
Yes, you can safely freeze stuffing, before or after it is cooked.
Yes you can, but it will take longer to cook as the meat is frozen.
You can safely store cooked beef in the refrigerator for 3 to 4 days.