Combine sugar and cinnamon in a large bowl; stir well.
Add eggs, egg whites, vanilla, and salt; stir well. Gradually stir in milk.
Add the bread cubes and chocolate; stir well and let stand 5 minutes.
Transfer mixture to baking dish.
Bake for 50-55 minutes or until puffed and set in center.
Let stand at least 10 minutes.
While pudding bakes, puree thawed raspberries with their syrup in a food processor.
Transfer mixture to a strainer placed over a bowl. Press on solids with a wooden spoon; discard seeds. Reserve sauce. Spoon 1/8 of pudding into dessert bowls or glasses.
Serve with raspberry sauce.
Garnish with fresh raspberries and mint sprigs, if desired.