In a medium bowl, whisk together flour and baking powder. Add sugar to eggs gradually, beating constantly, until smooth and thick. Stir in yogurt.

Add orange rind and flour mixture; beat only until smooth.

Pour batter into a greased 8-inch square baking pan.

Bake at 375° for 35 minutes or just until a toothpick inserted in center of cake comes out clean and cake is golden on top. Remove and cool on a wire rack.

Pour cooled syrup slowly over still-hot cake until absorbed. Allow cake to cool for 15 minutes. Cut diagonally into diamond shaped wedges. Serve plain or topped with ice cream, whipped cream, diced Mandarin orange sections, chopped toasted almonds, Macadamia nuts or pistachios.

Makes 12 servings.