Rice cookers can make more than just rice, but they make rice really well. To up the flavour factor and make a super tasty, super easy dish using only your rice cooker, you just need to grab a tomato.
The above video walks you through the super simple process, but it's really just a matter of plunking a whole tomato on top of your rice (with as much water as your rice cooker's manufacturer recommends), along with a little oil and some salt and pepper. Cook the rice as usual and, when it's done, stir, stir, stir, to get all of that juicy, umami-rich, tomato goodness distributed throughout. You can then eat it on its own, serve it as a side, mix in some sort of protein and veggies, or top it with an egg. (You should probably top it with an egg.)
Whole Tomato in Rice Cooker = Simple Delicious Rice Dish [Strictly Dumpling]