Cook the tortellini according to package instructions. Drain and rinse with cold water.
Add tortellini to a large bowl. Add cooked corn, black beans, bell pepper, avocado, cherry tomatoes, onion, and cilantro.
Combine all the dressing ingredients in a resealable jar. Shake until combined. Pour the desired amount of dressing (you may not want to use it all) over the pasta and toss to coat.