Combine sugar and orange juice in a saucepan. Heat and stir until sugar is dissolved. Set aside to cool.

Whirl fruit and lemon juice in blender until fruit is pulp. Add yogurt, blending well. With motor running, add cooled orange juice mixture.

Pour into a 9-inch square, flat pan and place in freezer for two hours or until mixture is frozen into a slush. Break up mixture and put in mixer bowl. Beat until smooth, adding eggs one at a time. Continue beating until light and fluffy.

Return to pan or freezer-proof dessert containers and freeze until firm, about one hour.

For very juicy fruit, such as raspberries or frozen fruit, the orange juice may be decreased in proportion to the amount of juice. Increase the lemon juice by 1 teaspoon for each 1/8 cup the orange juice is decreased.

* A low-calorie frozen dessert with yogurt and fruit ~- This refreshing and healthful dessert can be made with any of several types of fruit, such as bananas or strawberries, for a low calorie summer-time treat.