Lemon meringue ice-cream cake

Name: Lemon meringue ice-cream cake
Prep time: 5 min
Cook time: 13 h 15 min
Total time: 13 h 15 min
Yield: 12 slices
Ingredients: 200 g caster sugar; 240 g freshly squeezed lemon juice; 160 g unsalted butter; 4 eggs; 120 g caster sugar; 3 egg yolks; 750 g pouring (whipping) cream; 1 tsp natural vanilla extract; 1 pinch sea salt; unsalted butter; 70 g caster sugar; 2 eggs; 1 natural vanilla extract; 70 g self-raising flour; 240 g caster sugar; 6 egg whites; ¾ tsp cream of tartar; 1 tsp natural vanilla extract; 1 pinch sea salt