Instructions

1. Spray inside of 9-inch round springform cake pan with nonstick cooking spray and line sides with aluminum foil or plastic wrap.
2. In medium bowl, whisk together Nutella and 1/4 cup water until smooth, creating rich Nutella syrup. Set aside.
3. Cut 15 width-wise slices (1/2-inch each) of pound cake with serrated knife and use 10 slices to line pan's inside edge, pressing sides to form overlapping pattern. Place remaining 5 slices on bottom to fill pan's base, cutting pieces as necessary to fill holes. Drizzle cake bottom with 1/4 cup Nutella mixture.
4. In large bowl, whip heavy cream until soft peaks form. Add sour cream and 1/2 cup Nutella mixture and continue to beat until mixture once again holds soft peaks.
5. Meanwhile, in small microwavable dish, place 2 tablespoons water and sprinkle with gelatine. Let stand for 1 minute. Microwave on HIGH for 20 to 30 seconds to soften gelatin. Stir until gelatine completely melts.
6. Whisk melted gelatine into Nutella-cream mixture until completely blended to create mousse-like texture.
7. Layer bottom of cake with 1 cup mixed berries. Spread mousse over berries.
8. Remove cake from pan and place on serving dish. Drizzle with remaining Nutella syrup. Make decorative pattern on cake with remaining 1 cup berries.
9. Refrigerate for 1 hour before serving.

Serving ideas: Using remaining 1 cup of berries, lay strawberries in concentric-circle pattern with pointed end of each strawberry facing outward. Fill center with remaining berries. Dust with confectioners' sugar just before serving.