I experiment intermittently with things I can bring in and heat/reheat in the microwave here. Mashed potato, risotto, pasta leftovers etc. A good one is a big vat of misc. veg. stew, containing whatever is left in the veg racks and fridge and needs eating. The vat is then decanted into storage boxes (some tupperware, some re-used chinese takeaway microwaveable plastic) for freezer and fridge. I've found this works best if I bring in some bread in to eat with the stew, but also that I can't usually manage more than 2 lunches like this in a week, it might be a food-too-samey problem.