"Where in Los Angeles could we go after a delightful Brentwood cocktail party? The Woodside Restaurant, of course, where the onion soup has everything traditional Parisian onion soups have: a rich broth, lots of onion flavor, a delicious crouton and just the right amount of cheese. The chef adds a splash of balsamic vinegar for an extra edge...."
INGREDIENTS
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4 tablespoons unsalted butter
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3 large white onions (about 2 1/2 pounds), thinly sliced
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1/2 cup plus 2 tablespoons Madeira
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4 cups chicken stock or canned low-sodium broth
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4 cups beef stock or canned low-sodium broth
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Salt and freshly ground pepper
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2 tablespoons balsamic vinegar (optional)
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Six thick slices stale sourdough bread
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2 cups grated Gruyère cheese (about 6 1/2 ounces)
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2 scallions, chopped