Make a big batch of bolognaise (I do use Quorn mince but you can substitute finely chopped open cup mushrooms.
You can add mild chilli spice, cummin and coriander to some with red kidney beans and freeze in portions. I also freeze rice in portions, then she only needs to micro.
Add barely cooked (so they don't go soggy on re-baking) pasta shapes to some of it and top off with a layer of cheese sauce (cheats lasagne). She can then just sling straight into oven from frozen with a bit of garlic bread if fancied...
Then freeze the rest in portions that she can use with spag.
If you make plenty of cheese sauce and cook extra pasta shapes you can freeze up portions of 'macaroni' cheese, simple but really tasty and satisfying on a cold day.
I also do a pasta dish with sauteed leeks and mushrooms. Saute (in lots of butter for flavour) then add tin of chickpeas and a couple of tins of mushroom soup lots of black pepper, splash of white wine if you've got some. Then again add barely cooked pasta shapes and freeze in individual portions. She can top off with grated cheese and bake.
You can do a cottage pie, as above with Quorn mince or mushrooms. Use lots of finely chopped veggies such as carrots, celery etc. Veg stock and red wine make this very flavoursome, as do Marmite and veggie Worcester sauce. Top with buttery, cheesy mash.
Make extra buttery, cheesy mash and mix with sauteed leek. Freeze in portions then she can have with veggie sausages and veg.
Sorry if too much obviously you don't need to do all of it, but I just wanted to show you that if you plan, you can make loads of diffferent things from one or two big cook offs i.e. cook one big pot of pasta for the 'lasagne' mac cheese and leek pasta bake. Sautee extra leeks and take out before adding the mush and you can use them for the leek mash. Make extra mash for the cottage pies for the same reason, etc.
Oh and you are a lovely, lovely friend. Have a 
and some 