Bring the h2o to a mild simmer and stir the chocolate inside the bowl because it heats. It'll take a while to soften the chocolate, but using the Bain-Marie will make certain it doesn’t burn off. ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​�