Boil a large pot of salted water and cook the pasta until al dente.
Drain the pasta thoroughly and rinse under cold water to stop the cooking process.
Mash one whole avocado in a large mixing bowl until smooth and creamy.
Whisk the lime juice and olive oil into the mashed avocado to form the dressing.
Stir the diced red onion and chopped cilantro into the dressing mixture.
Add the cooked chicken cubes and the second avocado (diced) to the bowl.
Add the cooked pasta and toss until every piece is evenly coated with the avocado mixture.
Fold in the halved cherry tomatoes last to keep them intact.