Use about 1/2 cup fresh chopped mango to a blender or food processor with enough water to loosen it. This should give you more than 2 ounces. Make a couple martinis or save what you don't use and put it in the refrigerator.
Add vodka, triple sec, mango puree, lime juice and ice to a shaker.
Shake until shaker is cold to the tough about 30 seconds.
Pour into martini glass and garnish with fresh mango.
Video
Notes
If fresh mango is not available just use mango nectar.