Process first 4 ingredients in a blender.
Blend for 1 minute, or until pureed.
Pour puree into a medium bowl.
Beat whipping cream at medium speed with an electric mixer until soft peaks form. If using tofu or banana whir in a food processor or blender until smooth and creamy.
Fold whipped cream or tofu or banana into mango puree, using a knife to swirl in a marbled effect.