Mix the ingredients of the sauce together and place in a bowl. Set to the side.

Meanwhile, in a pot, add the tamari and reduce until the tamari becomes a little thicker, using medium-high heat and watching it carefully. Add the purple onion and sauté for a few moments by adding a little water. Add the mushrooms and cook for a few more moments. Lastly, add the broccoli florets, and cook for a few minutes, but keep somewhat crisp.

Turn off the heat, add the sauce and mix thoroughly. Place in a serving bowl and enjoy.