Sweet caramelised onions in rich beef broth, topped with a cheesy crouton. Deeply satisfying.
Serves 4
Melt butter. Cook onions on low heat for 35-40 minutes, stirring occasionally, until deep golden brown. Add sugar halfway through.
40 min
Add wine, let it reduce. Pour in stock and thyme. Simmer for 20 minutes.
22 min
Ladle into oven-safe bowls. Top with sourdough and pile on gruyère. Grill until bubbling and golden.
5 min