Whisk together salad dressing, garlic, cilantro and lemon, set aside.
In large bowl, toss remaining ingredients together, reserving avocado. Pour dressing over vegetables, mixing well. Cover, chill at least 2 hours, can be made overnight. Drain, add avocado and toss. Serve with tortilla chips.
This recipe adapts easily to other vegetables, add and subtract to your individual taste.