In a large bowl, combine all salad ingredients, except Mozzarella cheese balls. That is, combine halved red and yellow grape or cherry tomatoes, diced avocado, chopped basil.
In a small bowl, combine all dressing ingredients: whisk olive oil, balsamic vinegar and honey until nice and smooth.
Add the salad dressing to the large bowl with salad, sprinkle with a small amount of salt, and toss to combine. Taste and season with more salt, if needed. Add Mozzarella cheese balls on top only at this point - so that they don't brown from the dressing.
