INGREDIENTS
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5 cups thinly sliced yellow onions
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3 tablespoons butter
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1 tablespoon oil
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1 teaspoon salt
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1/4 teaspoon sugar
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3 tablespoons flour
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2 quarts beef stock, boiling
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1/2 cup dry white wine
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salt and pepper to taste
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3 tablespoons cognac
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4-6 rounds of hard-toasted French bread
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1-2 cups grated Swiss or Parmesan cheese