Cook the quinoa per the instructions on the package.
While the quinoa cooks, dice the avocados, tomatoes, and onion.
Drain the black beans and corn.
Break the cheese into small bite-size chunks and set aside.
Roughly chop the cilantro and set aside.
Juice the limes and add the juice to a large mixing bowl.
Except for the quinoa, add everything to the bowl with the lime juice and stir to combine.
Drain the quinoa when it is done.
Add the quinoa to the mixing bowl and gently fold it into the mixture.
Serve immediately or chill in the fridge for three or four hours and serve cold. You may need to add a few drops of water and give it a stir if serving cold.