Start by cooking the brown rice or quinoa according to package instructions. Once done, set it aside.

In a bowl, mix the chicken strips with the fajita seasoning, salt, and pepper until well-coated.

Heat olive oil in a large skillet over medium heat. Once hot, add the seasoned chicken strips and cook until they are golden brown and cooked through (about 5-7 minutes). Remove from the skillet and set aside.

In the same skillet, add the sliced bell peppers and onion. Sauté for about 5-6 minutes until tender and slightly charred.

Add the black beans and cooked chicken back to the skillet with the vegetables, tossing everything together gently. Let it cook for an additional 2-3 minutes.

In serving bowls, layer the cooked rice or quinoa, followed by the chicken and vegetable mixture. Top with avocado slices and any additional toppings of your choice.

Garnish with fresh cilantro and a squeeze of lime, if desired. Dig in and savor each delicious bite!