When the wine is almost evaporated, add the broth or water, along with the soaked mushrooms. (If you're not making the mushroom garnish, you can add some or all of the soaking liquid, strained of any grit, as well.) Cover and let the roast braise over low heat until tender. (Times can vary, but 2-3 hours should be enough, although some recipes call for 4-6 hours of braising.) Adjust the heat so that the braising liquid simmers gently. Add more liquid (broth, water or mushroom water) if things get too dry.