Bring 2 cups water and quinoa to a boil over medium-high heat. Cover and reduce heat to medium-low, cooking 8-10 minutes or until water is absorbed and quinoa is tender. Remove from heat, uncover and set aside to cool.
In a large bowl, combine, black beans, corn salsa, avocados, tomatoes, and onions. Set aside until quinoa is cooled. Transfer quinoa to bowl.
In a small bowl, whisk together lime juice, salt and olive oil. Pour dressing over quinoa and gently toss until salad all ingredients are well combined.
Serve as a side dish or salad with your favorie meal.