directly melt the chocolate into chocolate sauce.after melting the chocolate, you can pour it over the egg custard as a decorative topping.or use the chocolate sauce in a piping bag to make chocolate rose decorations or other intricate designs.not only will they look good but also taste delicious.Use the cake as a decoration on top.or pipe chocolate rosettes or roses using a piping bag.Not only do they look beautiful, but they also taste great.Decorate with icing or chocolate piping not only for looks but also for taste.