Roughly grate the marzipan. Beat egg white and lemon juice until stiff. Add sugar and hazelnuts. Add marzipan and stir in with the whisk of the hand mixer. Pour the macaroon mixture into a piping bag with star-shaped spout and squirt tuffs onto the wafers.
Spread on 2 baking trays lined with baking paper. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 12-15 minutes until brown. Let them cool down. Chop the chocolate and melt over a warm water bath. Dip the tuffs with the tip into the chocolate, decorate with crumbled, candied rose petals and leave to set in a cool place
Waiting time approx. 30 minutes