This is more 'culinary' and less 'art' but I have a frozen lasagna in the oven and I was wondering how to check when it's done? Usually when I cook them I burn the bottom. The lasagna is in an aluminum pan with an aluminum cover that I remove about 20 minutes before it's done. Any tips would be greatly appreciated.

Just check it periodically and once the pasta is done to your liking it's done - check it at 15 min. Some people like it crispier than others, it's all about how you want it.

so its been in the oven for a while, take a toothpick stick to to the center of ur lasagne, if the whole pick is warm its done.

put it on a higher rack and/or drop the temp. by 15-20 degrees. usually works fine for me

usually frozen lasagnas are done when they are burned around the edges and the middle isn't frozen. to check take a knife and stab the middle, if the tip of the knife if cold it isn't done

next time let defrost