In a medium bowl, combine chicken strips with 1 tablespoon of olive oil, chili powder, cumin, garlic powder, salt, and pepper. Toss to coat evenly.
Heat a large skillet over medium-high heat and add the seasoned chicken. Cook for 6 to 8 minutes or until the internal temperature reaches 165°F (74°C). Remove chicken from the skillet and set aside.
In the same skillet, add the remaining 1 tablespoon of olive oil. Add the sliced bell peppers and onion. Sauté for 5 to 7 minutes until the vegetables are tender-crisp and have slight char marks.
Divide the cooked rice into four serving bowls.
Top each bowl with equal portions of the sautéed chicken, peppers, onions, black beans, and corn.
Garnish each bowl with avocado slices, a drizzle of lime juice, and fresh cilantro before serving.