01 - Preheat oven to 350°F. Grease and line a 9-inch springform pan with parchment paper.
02 - Beat egg whites with half the sugar until stiff peaks form in a clean mixing bowl.
03 - Whisk egg yolks with remaining sugar in a separate bowl. Add melted butter and vanilla extract, whisking until combined.
04 - Fold almond flour, all-purpose flour, and salt into the yolk mixture until just incorporated.
05 - Gently fold beaten egg whites into the batter using a rubber spatula, being careful not to deflate the mixture.
06 - Pour batter into prepared pan. Bake for 20-25 minutes until golden and a toothpick inserted in the center comes out clean. Cool completely in the pan.
07 - Soak gelatin sheets in cold water for 5 minutes. If using powdered gelatin, bloom in 3 tbsp cold water.
08 - Heat raspberries, sugar, and lemon juice in a saucepan over medium heat until raspberries break down. Purée and strain through a fine mesh sieve to remove seeds.
09 - Warm 3 tbsp raspberry purée and dissolve the bloomed gelatin. Stir back into the remaining purée and let cool to room temperature.
10 - Whip cold heavy cream to soft peaks using an electric mixer.
11 - Gently fold cooled raspberry mixture into whipped cream until smooth and fully incorporated.
12 - Place cooled almond sponge in a cleaned springform ring. Spread raspberry mousse evenly over the sponge. Refrigerate for 2 hours until set.
13 - Soak gelatin sheets in cold water. Heat raspberry purée and sugar until warm, then dissolve gelatin. Cool slightly.
14 - Pour glaze gently over the set mousse layer. Refrigerate at least 1 hour until glaze is completely set.
15 - Release cake from springform pan. Garnish with fresh raspberries and mint leaves before serving.