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.
122 calories;0 g fat(0 g sat); 5 g fiber; 30 g carbohydrates; 2 g protein; 48 mcg folate; 0 mg cholesterol; 21 g sugars; 0 g added sugars; 402 IU vitamin A; 94 mg vitamin C; 70 mg calcium; 1 mg iron; 2 mg sodium; 236 mg potassium