The cheese in the lasagna is like actual concrete on your spoon. Its good but that cheese will take a good amount of teeth scraping to get off. I recommend packing a spork from a fast food place to eat that particular meal 
That is very good advice!
Great idea! I like the lasagna but that cheese is like Gorilla Glue. I've known several people who won't buy it anymore because of the clean up problem.
With their red sauce meals you have 3 ways to deal with that cheese grit at the bottom:
1) Add more water than suggested
2) After 10 minutes, open, scrape the bottom with a SPOON, mix again, close and let sit for longer.
3) If you don’t want to lose the heat so as to continue to cook, massage the bag for awhile

FYI this works for all kinds of bags