INGREDIENTS
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1 cup hot water
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1 ounce dried porcini mushrooms
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1 garlic clove, minced
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1 tablespoon plus 1 1/4 cups Sauvignon Blanc or other dry white wine
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2 teaspoons cornstarch
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8 ounces coarsely grated Gruyère cheese (about 2 packed cups)
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8 ounces coarsely grated Emmenthal cheese (about 2 packed cups)
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1 1-pound loaf ciabatta or other rustic bread, cut into 1-inch cubes
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2 pounds 1/4-inch-thick ham slices, cut into 1-inch pieces