Prepare the dressing by whisking together the olive oil, lime juice, sea salt, and black pepper in a small bowl until emulsified.
In a large mixing bowl, combine the halved cherry tomatoes, sliced cucumber, and sliced red onion.
Gently fold in the cubed avocado to maintain its structural integrity.
Drizzle the prepared dressing over the vegetables and add the chopped cilantro.
Toss the salad gently with a silicone spatula until all ingredients are evenly coated.
Serve immediately to prevent oxidation of the avocado.