French onion soup with gruyere

• 2 tbsp butter
• 3 medium onions, thinly sliced
• 1 tsp brown sugar
• 700 ml beef broth
• 1 tsp dried thyme
• 2 slices whole wheat bread
• 60 g gruyere cheese, shredded

Method

1. 1

   Melt the butter in a pot and cook the onions with the brown sugar over medium-low heat for 25 minutes, stirring often, until deeply golden.

2. 2

   Add the beef broth and thyme, then simmer for 10 minutes.

3. 3

   Toast the bread slices until crisp.

4. 4

   Ladle the soup into oven-safe bowls and top each with a slice of toasted bread and half the gruyere.

5. 5

   Broil for 2 to 3 minutes until the cheese is melted and bubbling.