Can I defrost stouffer's lasagna in the microwave and what oven temperature and amount to reheat?

It depends whether your container is heavy duty foil or plastic. You can reheat it in the microwave if it is plastic, just cover loosely with a paper towel or plastic wrap. Otherwise, you can reheat it in the oven for about 20 minutes at 325 or so. It depends whether your container is heavy duty foil or plastic. You can reheat it in the microwave if it is plastic, just cover loosely with a paper towel or plastic wrap. Otherwise, you can reheat it in the oven for about 20 minutes at 325 or so.