INGREDIENTS
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•3 tablespoons unsalted butter, divided evenly into 3 pieces
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•6 large yellow onions, halfed and cut root to stem into 1/4" thick slices
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•2 cloves garlic, chopped
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•salt
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•2 cups water, plus extra
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•1/2 cup dry sherry
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•1/3 cup dry red wine
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•4 cups low-sodium chicken broth
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•2 cups beef broth
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•6 sprigs fresh thyme, tied together with twine
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•1 bay leaf
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•black pepper
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•baguette slices cut 1/2" thick (1 per bowl).
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•8oz shredded Gruyere cheese