Ideas for warm breakfast bentos??

I'm terrible about eating breakfast everyday, so in an effort to make breafast more of a regular thing, I've been contemplating packing breakfast bentos ahead of time. The usual ideas such as cereal with milk, yogurt, smoothies etc are what many people do, but I tend to be very cold in the morning and would really love to have something warm to get me going. I've tried oatmeal with blueberries (which is yummy) but would like to have more variety. Any ideas for warm breakfast bentos out there? What do you typically eat for breakfast?