Combine mango and papaya with sugar and lemon juice in bowl and mix together well. Whip cream until soft peaks form. Fold in fruit mixture. Fold in yogurt. Pour mixture into a shallow glass bowl or pan. Freeze until the consistency of sherbet.

Approximately 5-10 minutes.

Per serving (excluding unknown items): 1741 Calories; 51g Fat (26% calories from fat); 11g Protein; 324g Carbohydrate; 192mg Cholesterol; 154 mg Sodium