Finely chop the onion

Add the butter to a medium pot and heat over medium heat until the butter is melted

Add the onion and rice

Cook, stirring frequently until the rice and onion are lightly browned

Add the vegetables, water, and bouillon granules to the pot

Stir the mixture to combine all ingredients

Increase the temperature to medium-high

Bring the mixture to a boil

Reduce the heat to medium-low

Cover the pot

Cook for 10 minutes

Stir

Serve