Ingredients
- 2 pounds yellow onions, sliced thinly
- 1/4 cup butter, plus some extra to butter the parchment paper
- 1-1/2 quarts beef stock
- 2 teaspoons of sugar
- 1 cup of red wine
For the topping:
- 6 ounce baguette
- 2 Tablespoons butter
- 3 ounces Gruyère
- Salt and freshly ground pepper
Preparation
- Cut a piece of parchment paper into a round to fit your saucepan.
- Melt the butter and add the onions. Season with salt and pepper.
- Butter the paper round and press it down on the onions. Cover the saucepan and cook the onions over low heat, stirring occasionally for 20-30 minutes.
- While the onions are cooking, in another saucepan, pour in the stock and bring it to a boil. Continue to boil it until it is reduced by one-third. (20-30 minutes).
- When the onions are done, remove the lid and the paper and sprinkle with the 2 teaspoons of sugar.
- Cook the onions a further 10-15 minutes, until they are carmelized. Do not let them burn.
- Add the reduced stock and the wine to the onions and bring to a boil.
- Reduce heat and simmer for 30 minutes. While waiting prepare the topping.
For the topping:
- Preheat oven to 350°. Cut the baguette into 1/2 inch slices. You should have 12 slices.
- Melt the butter and brush it on both sides of the baguette slices. Place them on a baking sheet.
- Bake them in the oven until they are lightly browned. Turn them once.
- Grate the Gruyère on the coarsest grid of a box grater.
To finish the soup:
- Heat the broiler and ladle the soup into ovenproof bowls.
- Top each bowl with 2 slices of bread and sprinkle on the grated Gruyère.
- Place the bowls on a baking sheet and broil about 2-3 minutes. (If you don’t have ovenproof bowls, you can sprinkle the cheese on the baguette slices, broil them, then float them on top of the soup.)
To Serve:
Transfer the bowl to individual plates and serve. Take care!! The bowls will be very hot.

