Place the butter and veggies in the rice cooker and press cook
After about 10 mins the butter will be melted and the onions will start to turn opaque.
add everything else, stir and restart the rice cooker, it will take a little longer than a normal batch
When the timer goes off stir the rice, close the lid and let it sit another 10 mins
Stove Top
Melt the butter over the stove and saute the vegetables.
Cook until the onions are opaque.
Add everything else, stir and bring to a boil
Reduce heat to a simmer, cover, and cook until rice is tender and has absorbed all the liquid, 16 to 18 minutes (check at 16 and see, it could take up to 20)