1 sponge cake layer
2–3 flavors frozen yogurt
4 egg whites
1 cup sugar
1/4 tsp cream of tartar
Place cake then spread softened frozen yogurt layer. Freeze each layer for 30 minutes. Freeze the entire cake for 2 hours.
Whisk egg whites with cream of tartar until its foamy. Add sugar gradually and whip until stiff peaks form.
Cover frozen cake with meringue and create swirls with spatula.
Use a torch to brown the meringue or bake at 230°C for 3-5 minutes and serve immediately.