Pastry:
Yoghurt cream:
Garnish:
Cream the butter with the sugar and egg. Add the buttermilk, walnuts, flour and baking powder. Transfer to a baking tin and bake at 180°C for 30 minutes.
Cream:
Combine the natural yoghurt, low-fat ricotta and elderflower syrup. Soften the gelatine in cold water, drain and add. Fold in the whipped cream.
Spread the cream on top of the cooled base and transfer to the fridge. Garnish with raspberries, elderflower cream (add elderflowers to the cream the day beforehand, sieve well and whip to stiff peaks), and a few elderflowers.