01 - Preheat oven to 350°F. Grease and line a 9-inch springform pan with parchment paper.
02 - In a clean bowl, beat egg whites with half the sugar (1.75 oz) using an electric mixer until stiff glossy peaks form.
03 - In a separate bowl, whisk egg yolks with remaining sugar until thick and pale. Add melted butter and vanilla extract, whisking to combine.
04 - Fold almond flour, all-purpose flour, and salt into the yolk mixture until just incorporated.
05 - Gently fold one-third of the whipped egg whites into the batter to lighten, then carefully fold in remaining whites until no white streaks remain.
06 - Pour batter into prepared pan and spread evenly. Bake for 20-25 minutes until golden brown and a toothpick inserted in center comes out clean. Cool completely in pan.
07 - Soak gelatin sheets in cold water for 5 minutes. If using powdered gelatin, bloom in 3 tbsp cold water for 5 minutes.
08 - Combine raspberries, sugar, and lemon juice in a saucepan over medium heat. Cook until raspberries break down and release juices, about 5 minutes.
09 - Press raspberry mixture through a fine mesh sieve into a clean bowl, discarding seeds. Return 3 tbsp of purée to saucepan.
10 - Warm reserved purée and dissolve bloomed gelatin completely. Stir back into remaining raspberry purée and cool to room temperature, stirring occasionally.
11 - In a chilled bowl, whip heavy cream to soft peaks using an electric mixer.
12 - Gently fold cooled raspberry purée into whipped cream until fully combined and smooth.
13 - Place cooled almond sponge bottom-side up in a clean 9-inch springform ring. Spread raspberry mousse evenly over sponge, smoothing top with offset spatula.
14 - Refrigerate for 2 hours until mousse is firm and set.
15 - Soak gelatin sheets in cold water for 5 minutes. If using powdered gelatin, bloom in 1 tbsp cold water.
16 - Heat raspberry purée and sugar in saucepan until warm and sugar dissolves. Remove from heat and stir in gelatin until completely dissolved. Cool to lukewarm.
17 - Pour glaze gently over chilled mousse layer, tilting pan to cover evenly. Return to refrigerator and chill for at least 1 hour until glaze is completely set.
18 - Release springform ring and carefully transfer cake to serving plate. Garnish with fresh raspberries and mint leaves. Slice and serve chilled.