I covered the top with ganache. Mix the cream with pieces of chocolate, put in the microwave for 2 minutes, mix and so on until the chocolate dissolves. Or a water bath. Pour everything on top, tilt the cake, let the ganache spread. We put it back to cool down a little. I had colored chocolate, I melted it and made a drawing. He poured a tablespoon into the center, and left stains with a knife. Well decorated. You can do things your own way.