In a medium pot, bring the vegetable broth or water to a boil.
Add the rinsed quinoa to the boiling broth, reduce heat to low, cover, and simmer for about 15 minutes, or until the quinoa is fluffy and liquid is absorbed.
Remove the quinoa from the heat, let it cool for a few minutes, and then fluff it with a fork.
In a large mixing bowl, combine the cooled quinoa, black beans, diced avocado, cherry tomatoes, red onion, yellow bell pepper, and chopped cilantro.
In a small bowl, whisk together the lime juice, olive oil, ground cumin, salt, and pepper.
Pour the dressing over the salad mixture and gently toss until well combined, being careful to not mash the avocado.
Taste and adjust seasoning as desired with more salt, pepper, or lime juice if needed.
Serve immediately or refrigerate for 30 minutes to allow flavors to meld before serving.
Notes
Serve the salad in a large bowl or individual plates, garnishing with extra cilantro and lime wedges on the side for a fresh touch.