
Chop and cook the onions in some oil for 10 minutes or so. Brown the meat in batches in a separate pan. When all the meat is done add to a very large pan with the onions and ad in tomatoes, mushrooms, a good amount of puree, kidney beans and chilli powder to taste. Reduce the heat and leave for a couple hours. Allow to cool then you can bag it up and freeze. Then just get one bag out each morning and it's ready for lunch time - 3 minutes in the microwave - Easy!
As long as you have the mince and tomatoes you can add pretty much anything you want in there.
(Recipe nutritional information based on the addition of 4 cans of kidney beans and 2 cans of tomato puree)