Orange Mousse Chocolate Torte

Directions

• In a heavy saucepan, melt butter and bittersweet chocolate over low heat, stirring constantly until smooth. Remove from the heat; whisk in sugar and nuts. Add eggs, one at a time, until blended. Pour into a greased 9-in. springform pan. Place pan on a baking sheet. Bake at 325° for 45 minutes or until a toothpick inserted in the center comes out with moist crumbs. Cool on a wire rack. Refrigerate.
• For mousse, in a saucepan, heat the orange juice concentrate, sugar and water until warm. In a small bowl, sprinkle gelatin over lemon juice; let stand for 1 minute. Add to chocolate; stir until gelatin is dissolved. Add white chocolate; stir just until melted. Whisk in sour cream. Pour into a large bowl. Refrigerate, stirring often, until cool and thickened but not set, about 1-1/2 hours.
• In a small bowl, beat cream until stiff peaks form; fold until orange mixture. Pour over crust (pan will be full). Refrigerate for several hours or overnight. Carefully run a knife around edge of pan to loosen; remove torte from pan. Garnish with chocolate curls and cocoa if desired.