Directions
- 1Finely slice three onions.
- 2In a pan, add the sliced onions, butter, olive oil, salt, and pepper. Stir.
- 3Cover and cook the onions until softened.
- 4Add brown sugar and cook further until caramelized and slightly browned.
- 5Add beef stock and stir.
- 6Slice the bread and toast it.
- 7Spread mustard on each slice of bread.
- 8Place mustard-covered bread slices into the onion soup.
- 9Top with grated Gruyere cheese.
- 10Place in the oven until the cheese is melted and bubbly.
Ingredients
- 3 onions
- 1 piece butter
- 2 tablespoons olive oil
- 2 pinches salt
- 2 pinches pepper
- 1 tablespoon brown sugar
- 1 loaf bread
- 1 bottle beef stock
- 1 tablespoon Worcestershire sauce
- 8 tablespoons mustard
- 100 grams gruyere cheese
Equipment
knifecutting boardfrying panspatulagraterovenbaking sheet
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