I agree with tesspug. Burrittos, smothered hamburger steaks, swedish meatballs and noodles.
Give her some good crockpot recipes as well. If you want to do them for her just layer the stuff in the crockpot lined with a reynolds wrap bag, cook until almost done, than freeze in the crockpot, lift out and send it on. All they have to do is drop bag and all into a crockpot and let it heat up over the day.