Eggs and sugar beat with a mixer. Then add the oil, pureed bananas and finally add the dry ingredients. Stir until a homogeneous mixture and bake 15-20 minutes at 180C degrees. Then, the syrup prepared from 1 cup water and 1 cup sugar. In the hot syrup is cold syrup bases. mascarpone, cream and chocolate melted in a water bath mix. Add sugar and vanilla and beat with mixer until complete dissolution. Assembly is usual: base, syrup, cream (can be put and bananas between the bases). Decorate optional.