Ingredients
Method
- Peel the onion and cut it into thin rings or half rings.
- Melt the butter in a suitable saucepan.
- Add the onion. Reduce the heat to medium and cover the pot. The onions must simmer for at least 30 minutes. Caution: Stay with them and stir frequently, otherwise the onions will burn.
- Deglaze with white wine and cognac. Add beef stock and simmer for 10 minutes.
- Meanwhile, grate the cheese and spread it over the four slices of bread. Bake in the oven until the cheese has melted and the bread is crispy.
- Divide the soup between four bowls and place a cheese sandwich on top of each one.
Notes
If you want to do it the original French way, divide the soup between four ovenproof soup bowls. Add the bread directly to the soup and sprinkle a thick layer of cheese on top. Then bake the soup bowls in the oven at a very high temperature until the cheese forms a crust.