Apple & Pistachio Cake

Ingredients

• 100 g shelled pistachio nuts
• 30 g rice flour
• ½ tsp baking powder
• 150 g ground almonds
• 6 eggs, separated
• 220 g caster sugar, divided
• 50 g apple, grated
• 50 g unsalted butter melted
• 3 apples, peeled, roughly chopped
• 4 egg whites, at room temperature
• 265 g caster sugar
• Pinch of salt
• 450 g unsalted butter, cubed, at room temperature
• 1 tsp vanilla extract
• ¼ tsp cream of tartar
• 80 mL water
• 50 g pistachio kernels, roughly chopped, to decorate
• Thyme sprigs, to decorate