For the salad dressing, whisk all of the ingredients together, put in a container, and chill in the fridge until ready for use.
For the salad get a large salad bowl and toss together the mango, lettuce, strawberries, blueberries, tomatoes, avocado, and onion. Let sit in the fridge for 30 minutes so the flavors can blend.
When ready, top with mulberries and serve with salad dressing.