1. In a small bowl, sprinkle the sliced strawberries with sugar.
2. Puree half of the strawberries in a food prcessor to make a strawberry sauce. Reserve the sauce and the remaining sliced strawberries in the refrigerator until ready to use.
3. Pour a few teaspoons of strawberry sauce into the bottom of each sundae glass. Add a scoop of frozen yogurt to each and drizzle with more strawberry sauce. Add another scoop of frozen yogurt and top with the remaining sauce and sliced strawberries.
4. Decorate each sundae with nuts and chocolate shavings.Serving Size: 1 sundae