Start by cooking the quinoa. In a medium saucepan, bring water or vegetable broth to a boil. Add the rinsed quinoa, reduce the heat to low, cover, and let it simmer for about 15 minutes, or until all the liquid is absorbed and the quinoa is fluffy. Remove from heat and let it cool.
In a large mixing bowl, combine the cooked quinoa, black beans, cherry tomatoes, avocado, red onion, and corn.
In a separate small bowl, whisk together the lime juice, olive oil, cumin, salt, and pepper until well combined.
Pour the dressing over the quinoa mixture and gently toss to combine, making sure to be careful with the avocado to prevent it from mashing.
Finally, fold in the chopped cilantro and give it one last gentle mix.
Taste and adjust seasoning if necessary, adding more lime juice, salt, or pepper to your preference.
Notes
Serve chilled or at room temperature. Garnish with extra cilantro and lime wedges.