Cook the brown rice according to the package instructions until fluffy.
Slice the chicken breast into thin strips and toss in a bowl with chili powder, ground cumin, garlic powder, sea salt, and black pepper.
Heat the olive oil in a large skillet over medium-high heat.
Add the seasoned chicken strips to the skillet and sauté until golden brown and cooked through, approximately 6 minutes.
Remove the chicken from the skillet and add the sliced red bell pepper, green bell pepper, and red onion.
Sauté the vegetables for 4-5 minutes until they are tender-crisp and show slight char marks.
Divide the cooked brown rice into bowls and top with the sautéed chicken and roasted vegetables.
Garnish each bowl with avocado slices, fresh cilantro, and a squeeze of lime juice.