Cook the brown rice according to package instructions and set aside.
Dice the chicken breast into bite-sized pieces and season with cumin, garlic powder, sea salt, and black pepper.
Heat olive oil in a large skillet over medium-high heat and sauté the chicken until golden and cooked through.
Add the sliced bell peppers and diced red onion to the skillet, cooking for 3-4 minutes until slightly softened.
Rinse and drain the black beans, then warm them briefly in a small pot or the microwave.
Divide the cooked rice, chicken mixture, and beans into meal prep containers.
Top each bowl with salsa, fresh cilantro, a squeeze of lime juice, and sliced avocado.
Sprinkle with roasted pepitas for a crunchy snack-like finish before sealing the containers.