In a medium saucepan, bring chicken broth (or water) to a boil. Add rinsed quinoa, reduce heat to low, cover, and simmer for about 15 minutes or until the liquid is absorbed. Fluff with a fork and set aside to cool.
While quinoa is cooking, season chicken breasts with olive oil, cumin, salt, and pepper on both sides. Heat a skillet over medium heat and cook the chicken for about 6-7 minutes on each side or until fully cooked and golden brown. Remove from heat and let it rest for a few minutes before slicing.
In a large bowl, combine cooled quinoa, black beans, diced red bell pepper, halved cherry tomatoes, diced avocado, chopped red onion, and cilantro.
Slice the cooked chicken and place it on top of the quinoa mixture.
In a small bowl, whisk together lime juice and lime zest, then pour it over the salad. Toss gently to combine all the ingredients without mashing the avocado.
Taste and adjust seasonings if necessary, adding more salt, pepper, or lime juice as desired.
Notes
Serve in a large, shallow bowl, garnished with extra cilantro and lime wedges.