Start by thinly slicing your chicken breasts.
In a large bowl, mix chicken slices with 1 tbsp of fajita seasoning, ensuring they are well coated.
Slice bell peppers and onions into thin strips.
In a large skillet, heat 1 tbsp of olive oil over medium heat.
Add the chicken to the skillet and cook until it’s golden brown and no longer pink inside, approximately 7-8 minutes.
Remove the chicken from the skillet and set it aside.
Add another tbsp of olive oil to the skillet.
Toss in the sliced bell peppers and onions.
Season the vegetables with the remaining tbsp of fajita seasoning.
Sauté the veggies until they are tender and have a slight char, roughly 7 minutes.
As veggies cook, prepare your brown rice according to its package instructions.
Mix cooked rice with lime juice and chopped cilantro.
In serving bowls, layer the cilantro-lime rice, cooked chicken, sautéed vegetables, black beans, and sliced avocado.
Season with salt, pepper, and additional lime juice if desired.