Yup. Them things. And more. My grandma showed me a really simple dish for when I moved into my first little bedsit flat with a single hot plate: rice in a pot (he does know how to boil water, right?), one dish bottom down on top, fish filet on the dish, pat of butter, dash of lemon, maybe some herbs, and a simple veggie such as canned asparagus, 'nother dinner plate on top. When the rice is done, so is the fish with veggie and sauce all on a hot dinner plate -- or actually two, in case you get home in time to share.