If you’ve melted solid chocolate, you know that even a tiny bit of water inadvertently splashed into the bowl can make that beautifully smooth, glossy chocolate “seize,” turning it into a dry, dull, grainy mess. Melted chocolate and water just don’t mix! Or do they? Meet water ganache, regular ganache’s simplified sibling. While a standard ganache combines heavy cream and chopped chocolate, water ganache substitutes water for cream, resulting in a glaze, sauce, or filling that brings its own special attributes to the table.   Photography by Rick Holbrook; food styling by Kaitlin Wayne These Churro Cupcakes cradle a tempting well of ganache on top. Water ganache: Why use it? Using water instead of heavy cream sharpens the ganache’s chocolate flavor: The milk solids, sugars, and fat in heavy cream tend to mute the subtly fruity notes of a deeply bittersweet chocolate, or the mild tang of milk chocolate. Water, meanwhile, lets these flavors shine.…