When I first started freezing lasagna,
the first one I thawed and it came out very watery and soupy.
The next time I did it I didn't cook the noodles, came out ok little chewy, little dry
So third time a charm, I partially cooked the noodles and thawed before cooking and came out perfect.
With just the hubbie and me now, I make my lasagna in the loaf pan now and make 2. for the that I put in freezer I lined the loaf pan with plastic wrap then make the lasagna freezer it - once frozen I remove it from the pan - remove plastic wrap and place in a zip lock bag. That frees up my loaf pan for other stuff. Then when ready just take the brick of lasagna and place back into the loaf pan to thaw.
One day your life will flash before your eyes. Make sure it's worth watching