2 lb Plums -- pitted & chopped
3/4 c Sugar -- or substitute
1 Cinnamon Stick
32 oz Nonfat Yogurt -- vanilla
In saucepan combine plums, sugar, cinnamon stick and 1/2 C water. Bring to boiling over high heat. Reduce heat to low; cover and simmer 10 min. until plums are tender, stirring occasionally. Remove from heat; discard cinnamon stick.
In blender process plum mixture until smooth. Press plum puree with back of spoon thru sieve set over bowl. Discard skin and pulp. Pour plum-yogurt mixture into 9" sq. metal baking pan. Cover and freeze for 2 hours until firm.