Blackberry meringue cake

Name: Blackberry meringue cake
Prep time: 35 min
Cook time: 3 h 55 min
Total time: 3 h 55 min
Yield: 10 portions
Ingredients: unsalted butter; 50 g blanched almonds; 4 eggs; 200 g unsalted butter; 200 g self-raising flour; 100 g milk; 300 g caster sugar; 150 g frozen blackberries; 1 pinch cream of tartar; 2 tbsp flaked almonds; 300 g pouring (whipping) cream; 4 tbsp blackberry jam; pure icing sugar; 100 g frozen blackberries