Cut chicken breast in half lengthwise then season with garlic salt and pepper to taste and sautee in olive oil over medium high heat until browned and cooked through (3 min per side). Remove from pan, cool for 5 minutes then slice into strips against the grain.
In a large salad bowl, add chopped romaine. Top with halved cherry tomatoes, sliced cucumber, diced mango and avocado, thinly sliced purple onion, cilantro (cilantro can be omitted if you have a cilantro aversion).
Honey Vinaigrette Dressing:
Combine the Honey Vinaigrette Dressing Ingredients in a mason jar, cover tightly with lid and shake together until well combined. You can also mix it up in a bowl and whisk thoroughly. If not using dressing right away, shake well just before serving. Drizzle the salad dressing over the chicken mango avocado salad, adding it to taste*