Soak the rice in cold water for 30 minutes. Drain well and dump into the rice cooker.
Pour in the broth.
Lightly crush the tomatoes with your hand and add to the rice.
Throw in the corn and green beans.
Sprinkle in salt and pepper, if needed.
Turn on the rice cooker and let it do its work.
When the corn and bean rice is done, fluff up with a fork to separate the grains before serving.