above. For the final layer type, simply slice your Bananas. If you are preparing this trifle a good few hours in advance, then coat your Banana slices in Lemon Juice to stop them from going brown. Now simply start to build your layers! I started with a biscuit layer, topped with chocolate ganache, then topped with sliced bananas. Followed by a coating of yummy banana whip. This is the messiest layer so you may want to clean up the sides of the bowl with a bit of kitchen roll before starting on your next layer. Keep building your layers until all your ingredients are in the trifle bowl -- I finished with a layer of bananas!