Warming the berries enhances their flavor and makes a pleasing contrast to the cool orange slices. Fresh pineapple can stand in for the oranges. Source: EatingWell Magazine, March 1998
With a sharp knife, remove and discard the skin and white pith from oranges; slice the oranges crosswise and arrange on 4 dessert plates.
Combine sugar (or Splenda), lemon juice and cinnamon in a small saucepan; stir over low heat until bubbling. Add raspberries and stir gently until the berries are just thawed. Spoon over the orange slices and serve immediately.