Preheat oven to 200 degrees. prepare baking paper by greasing it with butter.
1 banana peeled and mashed with sugar, butter, lemon juice and eggs in a bowl. Mix in flour, chopped hazelnuts and baking powder. Spread the resulting dough on the form and bake for 15 minutes. Then take the cake out and let it cool down a bit.
Wash, peel and cut banana and strawberries. Add lemon juice to them so that they absorb it.
For cream: Mix mascarpone with vanilla sugar and lemon juice using a mixer.
Spread the cream over the pie. Top with sliced strawberries and bananas. Mix cake jelly with sugar and water. Pour the resulting mixture over the top of the cake.
Let the mixture dry.
Enjoy your meal.