1. Preheat oven to 375°.
2. Place Citrus Shortcake cubes on a baking sheet lined with parchment paper. Bake at 375° for 10 minutes or until toasted, turning after 5 minutes. Cool completely on pan on a wire rack.
3. Combine yogurt, 2 tablespoons sugar, 1 tablespoon liqueur, and rind.
4. Combine strawberries, remaining 1 tablespoon sugar, and remaining 1 tablespoon liqueur in a medium bowl. Gently stir in blackberries.
5. Place 3 shortcake cubes in each of 4 (8-ounce) glasses or dessert bowls. Top each serving with about 1 tablespoon fruit mixture; top fruit mixture with 1 1/2 tablespoons yogurt mixture. Repeat layers, ending with yogurt. Serve immediately, or cover and refrigerate up to 1 hour.