Warm apricot jam and spread over sponge in a frame.
Pour light chocolate ganache over apricot jam and level. Top with sacher sponge and repeat, finishing with a final sheet of apricot sponge.
Cut bars of cake @ 3.25”. Cut bars into 1.25” wide pieces and freeze.
Dip frozen sacher rectangles in prepared hard glaze. Remove excess glaze.
Whip the chocolate Chantilly and pipe using a French tip in a looping fashion. Garnish with apricot and chocolate deco.