""Try substituting vermouth for the white wine!"..."
INGREDIENTS
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1 tablespoon butter
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1 tablespoon olive oil
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4 large onion, thinly sliced
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1 tablespoon all-purpose flour
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2 (14 ounce) cans beef broth
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1/2 cup white wine
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1 1/2 cups water
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2 bay leaves
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6 slices French bread
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1 cup shredded Swiss cheese