I am attempting to make a Nutella torte for my restaurant, I am layering chocolate cake and Nutella mousse (which is basically a tiramisu mousse with nutella) in a ring mold. The problem I am having is I want to pour ganache over the cake to seal it, I am I have tried a few ganache recipes and pour them over the cake which I froze to aid the process. However ever time I find that the warm ganache is melting the mousse and causing the coating to be spotty and the cake begins to lean and fall slightly. I even tried a glacage using gelatin, however this is still too runny and doesn't give me the desired look or texture.
Please can anyone help?