Combine first 3 ingredients until well blended. Refrigerate until ready to use.
Grill fruit 6 min. or until lightly browned on both sides, turning over after 3 min.
Arrange fruit on platter.
Serve immediately with sour cream mixture. Or, cover and refrigerate fruit platter and sour cream mixture separately until ready to serve. Spoon sour cream mixture over fruit just before serving.