Start by making the dressing in a large mixing bowl. Add in the mayo and Greek yogurt then whisk in the seasonings.
Add the chicken, bacon, and green onions into the bowl. Mix well until it's all combined. Add in the diced tomatoes and mix again to incorporate.
Once it's all mixed together, taste and adjust the seasonings. Add in the diced avocado once you are ready to serve and gently toss into the desired portion of chicken salad (or you can leave them in a single layer on top).
Place into an airtight container and store in the fridge for at least 1 hour before serving.
