Cook the brown rice according to package instructions until tender and set aside.
Slice the chicken breast into thin, bite-sized strips and season with sea salt and black pepper.
Heat the sesame oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet and sauté until golden brown and cooked through, approximately 5-7 minutes.
Remove the chicken from the pan and set aside on a plate.
In the same skillet, add the broccoli florets, sliced bell pepper, minced ginger, and minced garlic.
Stir-fry the vegetables for 3-4 minutes until they are vibrant and tender-crisp.
Return the chicken to the skillet and pour in the tamari and sriracha.
Toss all ingredients together for 1 minute to ensure everything is well-coated in the spicy glaze.
Serve the hot stir-fry immediately over the prepared brown rice.