My wife makes oatmeal in the microwave but that is just boiling water. You could make it as well in a coffee maker just by pouring the boiling water over the oatmeal and letting in soften. We have done it in hotels. I "cooked" a hot dog in a beer can using water from a tea kettle in New Zealand but it wasn't like rolling it on a charcoal grille or even in a pan. It was just heated up.