What I do for lunches is cook a large vat of chili on the weekend. I put it into disposable tupperware containers and freeze it. I can then just grab one in the morning and take it with me. Since it's frozen I can leave it on my desk during the morning and just microwave it come lunch time.
The recipes are posted on the Phase 1 Chilis - I think I titled it 3 wonderful chilis.
I hope this helps!