Preheat your grill or grill pan to medium-high heat. Lightly brush the chicken breasts with 1 tablespoon of olive oil and season with half of the salt and black pepper.
Grill the chicken for 6-8 minutes per side, or until the internal temperature reaches 165°F (75°C). Remove from heat and let rest for 5 minutes before chopping into bite-sized cubes.
In a large mixing bowl, combine the chopped grilled chicken, diced avocado, halved cherry tomatoes, diced cucumber, chopped red onion, and fresh cilantro.
In a small jar, whisk together the remaining 1 tablespoon of olive oil, fresh lime juice, and the remaining salt and pepper to create the dressing.
Pour the dressing over the salad ingredients and toss gently to combine, ensuring the avocado chunks remain intact. Serve immediately or store in an airtight container for meal prep.