Hard boiled eggs are a perfect "convenience food."
You can make them up ahead of time and if need be you can peel one over the
sink & eat it with your fingers, no dishes, silverwear, etc, required.
Another easy make ahead thing is to put frozen veggies and seasonings in the
plastic tubs that yogurt or olives come in or in disposable containers.
Take it out of the freezer, nuke it, eat it & throw away the dish.
Robyn